New Vascular Records on Pelee and East Sister Islands, Essex County,

Craig A. Campbell' and A. A. Reznicek^

1421 King Street North. Waterloo, Ontario N2J 3Z4 ^Department of , Erindale College, University of Toronto, Mississauga, Ontario L5L 1C6

Campbell, C. A. and A. A. Reznicek. 1977. New records on Pelee and East Sister Islands, Essex County, Ontario. Canadian Field-Naturalist 92(1): 384-390.

Pelee Island, the southernmost part of Canada, has a diverse and very interesting flora containing many species rare or absent elsewhere in Canada. Reported as new to Canada are seven species of vascular : davisii, Care.x divulsa subsp. leersii, Sedum telephioides. Euphorbia obiusala, Myosotis macrosperma, Lycopus virginicus var. virginicus, and Senecio glabellus. These are briefly discussed. In addition, we report on the status of 13 very rare species known previously from the area: Camassia scilloides, Spiranthes magnicamporum, Celtis tenuifolia, Chenopodium foggii, Thalictrum dasycarpum. Corydalis flavula. Cydonia oblonga, Ammannia coccinea, Chaerophyllum procumbens, Phacelia purshii, Conobea multifida, Eupatorium ahissimum, and Eclipta prostrata. Fifty-five other species that are additions to the published flora of the Erie Archipelago, Pelee Island, and East Sister Island are listed as well.

Key Words: vascular plants, floristics, Erie Archipelago, Ontario, Canada, endangered species, phytogeography.

Field work on Pelee Island, Essex County, The warm chmate of Pelee Island is largely a

Ontario, during the past 1 years has resulted in a result of the moderating effects of ; the number of discoveries of considerable floristic mean annual temperature is 9.6° C (49.3° F), interest. Several species not previously reported several degrees higher than that of the mainland for Ontario or even for Canada have been of Essex-Kent Counties. The average growing recorded, although the Erie Islands have been season (free of killing frosts) is 192 days. quite extensively botanized (Macoun 1893; Core Droughty conditions do occur as a result of 1948; Duncan 1973). lighter rainfall than on the mainland (Core The first botanist to collect extensively on 1948). Pelee Island has relatively low rainfall, Pelee Island was John Macoun, Canadian shghtly under 75 cm (30 in) per year. Dominion Botanist, in 1882 (Macoun 1893). The flora of Pelee Island has strong affinities Later came C. K. Dodge, who produced the first with the Ohio-Mississippi River lowlands, and list of Pelee Island plants (1914), and then Core this affinity is reflected by some of the most (1948). The collections of Wilfred Botham, of abundant trees on the island, e.g., Celtis Occi- Cottam, Ontario were largely the basis for dent alis, Acer nigrum, Fraxinus quadrangulata, Boivin's (1953) additions to Core's hst. Recent Quercus macrocarpa, and Populus deltoides. work by Stuckey (1968), Duncan and Stuckey The north shore of Ohio was mapped as having (1970), and Duncan (1973), as well as by Stuckey small outliers by Transeau(1935); prairie and Duncan, currently updating the work of species are fairly well represented on Pelee Core, has added considerably to the published Island. Also, owing to its floristic affinities with flora. Our paper reports species in addition to the mid-west, Pelee Island, and especially the those recorded in these lists. southern points of it (Figure 1) are much more Pelee Island in particular has a wide diversity similar to Point Pelee than to the Niagara of plant habitats and a large flora for such a small Peninsula, despite the limestone bedrock. Few area. The island is situated in the western end of elements of the eastern Carolinian and/ or Lake Erie, in extreme southern Canada between Appalachian flora occur on Pelee Island; the

41°43' to 41°50'N, and 82°37' to 82°42'W. It is Tulip-tree {Liriodendron tulipifera) and Mag- the largest of the Erie archipelago islands: 4083 h nolia acuminata, for example, are missing from

(10085 acres). East Sister Island, also part of the Erie Islands. The flora of these islands is of Pelee Township, is approximately 13 km (8 mi) continual interest because of the southern species west of Pelee Island, at 41°49' N, 82°50' W; it is which seem to shift northward and thus first some 26 h (65 acres) in size, of which only about reach Canada on this archipelago. 14.6 (36) have been above water recently. Because of the warm cUmate of Pelee Island,

384 1977 Campbell and Reznicek: Vascular Plant Records, S.W. Ontario 385

and East Sister Islands and including whether the species are new to the flora of the Erie

Archipelago is also included. Our major collecting sites are shown in

Figure 1 ; others are specified in the annotated list which follows. Habitats are briefly noted; more details in connection with the present paper can be obtained from the Canadian Botanical Association's Survey of the Rare and En- dangered Plants of Canada.

Annotated List of Species

New to Canada Carex davisii Schwein. & Torr. Essex County, 9.6 km (6 mi) northeast of Amherst- burg along Canard River, occasional at edge of deciduous woods, 24 June 1955, Calder and van Rens 15928 (DAO,TRT) (sub C. formosa). Pelee Island, Mill Point, south side of main E-W road, edge of woods and cultivated field, 28 June 1975, Campbell and Harris (TRTE, WLU). This southern and mid-western species of lowland woods and meadows was previously recorded from nearby South Bass and Kelley's Islands, Ohio (Core 1948) and sparingly from extreme southern Michigan (Voss 1972). The report of this species from Quebec (Marie-Victorin 1935) has been shown to be an error Figure L Map of Pelee Island showing major collecting locations. by Rouleau (1964).

Carex divulsa Stokes subsp. leersii (Aschers & several cultivated species which persist and Graebn.) W. Koch + leersiana Rauschert, slowly spread on Pelee Island do so rarely or not (C polyphylla Kar. Kir., C. C leersii F. W. Schultz). Along South Road at elsewhere in Canada. These have not been junction with Stone Road just west of Mill Point, discussed in the list. They include Rosa multi- Pelee Island, 8 August 1974, Reznicek, Campbell and flora, Lonicera japonica, and Prunus persica. Donaldson (TRTE). flora is also The of Pelee Island somewhat A Eurasian sedge, C. divulsa subsp. leersii prefers paralleled by the fauna. The Small-mouthed calcareous soil (Jermy and Tutin 1968), as is the case Salamander {Ambystoma texanum), the Blue on Pelee Island. The taxonomic status of the Carex Racer {Coluber constrictorfoxi), the Red-bellied muricata aggregate, to which this species belongs, is Woodpecker (Melanerpes carolinus), and Blan- not yet fully clear. We follow here the nomenclature chard's Cricket Frog (Acris crepitans blan- proposed by David and Chater (1977). Further discussion of this difficult complex of species is chardi) occur in Canada as well established provided by Jermy and Tutin (1968), David and populations on Pelee Island only. These species Kelcey ( 1 974), and David ( 1 976). Complete synonomy are widespread in the central Mississippi-Ohio is listed in David (1976). lowlands, but very rare or absent elsewhere north Sedum telephioides Michx. of the international boundary. Pelee Island, Verbeek savanna, dry limestone Our floristic additions are recorded in the outcrop, pasture, 4 September 1974, Campbell and form of an annotated list, dealing first with Donaldson (WLU). vascular plants to Canada, and second with new This species was growing with Corydalis flavula in recent observations of rare species. short dis- A open rocky savanna. Since it was observed growing

cussion of the floristic and phytogeographic here close to houses, it may well be an escape from significance of each species is provided. A table cultivation. It was not reported for the Erie Islands by summarizing other additions to the flora of Pelee Core (1948) and Boivin (1953). Its native range is to 386 The Canadian Field-Naturalist Vol. 91

the south of Lake Erie (Clausen 1975), and it has not Gleason and Cronquist ( 1 963). Stuckey ( 1 975) records been previously reported from Canada. it as rare and local on the American Erie Islands and, in particular, in Perry's Monument Marsh on South Euphorbia obtusata Pursh Bass Island, where he considered it adventive from Essex County, River Canard, 17 June 1972, W. farther south. Botham (in herb. W. Botham). Pelee Island, Verbeek's, Harris Road (north side), Recent Records of Rare Plants open oak savanna (grazed), 9 June 1974, Campbell Camassia scilloides (Raf.) Cory Wild Hyacinth and Donaldson (CAN, WLU). Pelee Island, Brown's (Middle) Point, low rich open This is the first substantiated report of this species deciduous woods, 10 May 1974, Donaldson and for Canada. Soper's (1949) listing of this species from Campbell P74-1 (CAN); and Fish Point, wet hedge- southern Ontario was based on the report by Billings row, 7 August 1974, Campbell, Reznicek and Donald- (1862) (J. H. Soper, personal communications 1976). son (WLU). Billings' report was based upon a specimen of E. Although this lovely spring lily was known from wet platyphylla (Dore 1961). It is recorded by Gleason and meadows on White Island in the Detroit River near

Cronquist (1963) from Pennsylvania to Indiana. Amherstburg (1 1 June 1882, J. Macoun, CAN), it has been recently collected in Canada only on the Erie Myosotis macrosperma Engelm. (M. virginica var. Islands including Hen, Middle Sister, macrosperma (Engelm.) Fern.) and North Harbour (Core 1948) and Middle Island (9-10 May Pelee Island, Fish Point, woodland, 7 June 1970, 1939, H. Senn 1128 and J. H. Soper, TRT). This plant J. K. Morton (WAT). Pelee Island, Brown's (Middle) is vulnerable to picking and grazing and should be Point, low woods, 7 June 1974, Campbell (CAN, WLU). protected, or its extinction in Canada is probable. This large, wide-leaved plant of rich, low woods is Spiranthes magnicamporum Sheviak Plains' Ladies quite distinct from its nearest relative in the Canadian Tresses flora, M. verna, which usually occurs in sunnier, drier Pelee Island, Stone Road savanna, east side of road, habitats, as on Pelee Island limestone plains. Myosotis dry grassy road verge, 25 September 1976, Diebolt, macrosperma is known from Ohio (Fernald 1950). Francis and Campbell (WLU). This mid-western species, recently described (Shev- Lycopus virginicus L. var. virginicus iak 1973), is known now in Ontario from a number of Pelee Island, Fish Point, edge of muddy field, 7 sites in the southwest (Catling 1 976). Until this report, August 1974, Campbell, Reznicek, Donaldson (V^LU); no Spiranthes were known on the Erie Islands, McCormick Woods, low wet woods with red ash, 7 although Luer(1975) maps S. magnicamporum from August 1974, Reznicek (WLU); and Fish Point, moist the Ohio shore of Lake Erie. The Stone Road colony sandy soil of dune slack, 7 August 1974, Reznicek, consisted of about 40 individuals. Campbell, Donaldson (TRTE). Ahhough reported for Canada in the past, previous Celtis tenuifolia Nutt. Dwarf Hackberry records by many authors all appear to be based on Pelee Island, Fish Point, Lake Erie, 16 July 1958, misidentified material of L. uniflorus. These three L. J. Stock 348 (CAN) (sub C occidentalis); and Fish collections appear to be the first authentic Canadian Point, west side, near base of point, sand dunes, edge material to be reported. Henderson (1962) discussed of Lake Erie (woods edge), 8 August 1974, Reznicek, the features separating these two species, and has Donaldson and Campbell (CAN, TRTE). mapped L. virginicus as occurring mainly south of the The Dwarf Hackberries of the Great Lakes region glaciated zone in eastern North America. Its occur- have been designated C. tenuifolia var. soperi Boivin. rence on Pelee Island appears disjunct and similar to Boivin ( 1 967) recorded Canadian material only for the the distribution of Triosteum angustifolium (Duncan Grand Bend area. Lake Huron, as did Wagner (1974). 1973), which also occurs on the island but otherwise This plant is new for the Erie Islands flora (see Core largely south of glaciated territory. It has been 1948). recorded, however, from , Ohio (Core Chenopodium foggii Wahl 1948). Pelee Island, Fish Point, lagoon edge, sandy woods, Senecio glabellus Poir. Butterweed 4 September 1974, Campbell and Donaldson CWLU); Pelee Island, south marina, westernmost pond west Lake Henry, clay and limestone rubble dike, 18 of Bonnett's, moist sandy and rocky shore of Lake September 1975, Campbell, Reznicek and Donaldson Erie, 8 August 1974, Campbell. Reznicek and PI-75-F15 (WLU, TRTE); and Verbeek's savanna, 19 Donaldson (CAN). September 1975, Campbell, Reznicek and Donaldson This annual or biennial is reported for southwestern PI-F41 (WLU). Ohio, south-central Indiana, and southern Illinois by This uncommon native southern species has also 1977 Campbell and Reznicek: Vascular Plant Records, S.W. Ontario 387

been reported from Leeds County, Ontario and Chaerophyllum procumbens (L.) Crantz Spreading Pontiac County, Quebec (Wahl 1954) and from Chervil Lambton County, Ontario (Gaiser and Moore 1966), Pelee Island, Brown's Woods, 4 May 1971, Simp- and no doubt occurs sparingly elsewhere in southern son, Campbell and Pratt (WLU); Brown's (Middle) Ontario. Point, low rich deciduous woods, 11 May 1974, Campbell P74-27 and Donaldson (CAN); Mill Point, Thalictrum dasycarpum Fisch. & Lall. Purple Meadow-rue 12 May 1974, Donaldson and Campbell P74-23 (WLU); Stone Road, far to the east of Stone Road, Pelee Island, Brown's (Middle) Point, gravelly 1 June 1974, W. Botham 1609 (CAN); and Verbeek ditch, woods edge, 8 June 1974, Campbell and savanna, grassy wooded glade by south fence, 5 May Donaldson (CAN, WLU). 1976, Perrin and Campbell PI-76-11 (CAN, WLU). Considered a northwestern species in Ontario (B. This species was formerly known from Canada on Boivin, personal communication), it is known spar- White Island near Amherstberg, Ontario (moist ingly from southern Ontario. Our collection repre- places, 11 June 1882, J. Macoun, TRT), and from sents an addition to the Erie Islands flora, although Kelley's Island in Ohio (Core 1948). It was collected Core (1948) doubtfully reported it from South Bass from Pelee Island in 1914 (Point Pelee Island, 27 May Island, Ohio. 1914, N. Tripp (MICH)), but not from there again Corydalis flavula (Raf.) DC. Yellow Corydalis until our collection of 1971. Asis the case in Wisconsin Pelee Island, Verbeek savanna, Harris Road, rocky (Curtis 1959), on Pelee Island this plant, although oak glade, 12 May 1974, Campbell P74-26 and very local, may occur in dense colonies of hundreds.

Donaldson (CAN, WLU). It is interesting that collections from Pelee Island This delicate fumitory is presently known in Canada include both C. procumbens var. procumbens and the only from Point Pelee and Pelee Island. On Point pubescent-fruited var. shortii. The variety is appar- Pelee it has been collected as recently as 1 970 ( 1 7 May, ently more western (Deam 1940; Fernald 1950; Morton, CAN,TRT, herb. J. K. Morton). It was first Gleason 1952), and Pelee Island is within the area of collected on Pelee Island by Macoun (Burgess 1889), overlap of the two taxa. who also collected it at Amherstburg, Ontario, {J. Phacelia purshii Buckley Miami-mist Macoun, 10 June 1882, MTMG); and it was reported at Point Abino on the north-eastern shore of Lake Pelee Island, Stone Road, 1 June 1974, W. Botham Erie (Burgess 1889). 1614 (CAN); Pelee Island, 22 June 1975, W. Botham 7762 (TRT). Cydonia oblonga Mill. Quince Reported by Dodge (1914) for Middle Sister and Pelee Island, South Road (just west of south end. Chicken Islands in the Canadian Erie archipelago, this Stone Road), hedgerow along bush, 8 August 1974, constitutes the first record of this plant from Pelee Reznicek, Campbell and Donaldson (CAN, TRTE, Island. These stations on the Erie islands constitute WLU). the only native Canadian occurrences; collections The only other Canadian collection outside of from a clover field in the Central Experimental Farm cultivation is from Elgin County, along a creek at ( W. T. Macoun, 3 June 1898, DAO; July 1898, CAN) Aylmer, 4 Shumovich June 1953, Montgomery and are surely chance introductions. 606 (TRT). Our record is an addition for the Erie Islands. Conobea multifida (Michx.) Bentham Pelee Island, Stone Road, 13 June 1974, W. Botham Ammannia coccinea Rottb. 1672 (CAN); J. Harris lane behind barn. Lighthouse Essex County, Hillman Marsh, on mud flat, Point, muddy depressions, 19 September 1974, Rez- 42°03'N, 82°30'W, 7 September 1974, W. Botham nicek and Diebolt (WLU); and Lighthouse Point, 1704 (CAN); Pelee Island, Lake Henry, Lighthouse Lake Henry, mudflats, 19 September 1974, Reznicek, Point, mudflats, 19 September 1975, Reznicek and Campbell and Diebolt (WLU). Diebolt and Campbell PI-75-F30 (DAO, WLU). This obscure member of the Scrophulariaceae has The only other Canadian collections are from Lake been collected previously on Pelee Island a number of Osoyoos, British Columbia: J. W. Eastham, 27 times (Soper 1962) but nowhere else in Canada. Our September 1939 (DAO); Calder and Saville 11519, 6 collections extend its occurrence from the south parts August 1953 (DAO). of the island to the north end. It also occurs on Kelley's This is the first report of the species from eastern Island, Ohio (Core 1948). Canada; the collection by Campbell et al. is the first from the Erie Islands, although Core ( 1 950) reported it Eupatorium altissimum L. Tall Boneset from the Portage River swamps on the Ohio main- Essex County, Maidstone Township, RR at C3, land. 42°11'N, 82°46' W, 10 September 1968, IV. Botham 388 The Canadian Field-Naturalist Vol. 91

Erie Table I — Species new to the Archipelago, Pelee Island, 821 (CAN); Pelee Island, Stone Road savanna, 15 and East Sister Island September 1972, Campbell and Donaldson (WLU); Stone Road, dry open savanna, 7 August 1974, Erie Pelee East Sister Campbell, Reznicek and Donaldson (CAN, WLU); Species Archipelago Island Island and E-W road, west end (north side), red cedar savanna glade, 25-26 September 1976, Campbell, Poiamogeton crispus Francis and Diebolt (DAO). Poiamogeton foliosus First collected on the Ontario mainland in 1 968, and Buiomus umbellalus Island, this Bromus japonicus subsequently on Pelee prairie species was Hordeum juhatum also collected, as a probable adventive, along a Muhlenhergia schreheri railroad in Dundas (Pringle 1974). Core (1948)

Phalaris arundinacea recorded it from Kelley's Island, Ohio, as well. Few Panicum philadelphicum plants exist at the Pelee Island sites. Pankum dkholomiflorum Cyperus eryihrorhizos Eclipta prostrata (L.) L. {E. alba (L.) Hassk.) Yerba- Carex sanwellii de-Tago Wolffia punctata Essex County, Maiden Township, east of Amherst- Wolffia Columbiana Conimelina communis burg. Concession III, 42°16'N, 83°06'W, ditch, 12 Heieranthera duhia September 1971, W. Botham 1359 (CAN). Zigadenus glaucus Pelee Island, Fish Point, sandy gravelly shore of Smilax lamnoides var. lagoon, 7 August 1974, Reznicek, Campbell and hispida Donaldson s.n. (CAN, WLU); and Lighthouse Point, Iris pseudacorus new dike, disturbed soil behind J. Harris farm, 4 Can a ova lis September 1974, Campbell and Donaldson (CAN). Quercus palusiris Quercus velutina The first Canadian collection of this species was 5 Rumex maritimus September 1905, on Point Pelee (Klugh 1906), but it Cycloloma atriplicifolium was not reported in Canada again until Core (1948) Diplolaxis muralis noted it from Pelee Island. Duncan and Stuckey Dipiotaxis tenuifolia (1970) had recorded it from Lost Ballast Island, Ohio, Lunaria annua from where it later disappeared. It is a semi- Rorippa islandica Sedum sarmentosum cosmopolitan, subtropical annual. Polenlilla argentea Rosa palusiris New Records in the Erie Islands Flora Lotus corniculalus Euphorbia dentala Comparison of our collections with Calvert Euphorbia cyparissias (1920), Core (1948), Boivin (1953), Stuckey Euonymus atropurpureus and Stuckey Duncan Acer nigrum (1968), Duncan (1970), Lythrum alalum (1973), and Stuckey (1975) has disclosed that a Ludwigia palusiris number of species were new to the Erie Archi- Oenothera parviflora pelago, Pelee Island, or East Sister Island. These Myriophyllum spicatum listed in 1. vouchers for all these Osmorhiza longistylis are Table The Ipomea purpurea records are in WLU except for Zigadenus Hydrophyllum glaucus which is in Herbarium W. Botham and virginianum Rosa palusiris which is in the Rondeau Provin- Myosotis verna Physoslegia virginiana cial Park Herbarium. Lamium amplexicaule Lamium purpureum Lindernia dubia Discussion Linaria dalmatica Although many of the species we have Viburnum rafinesquianum recorded were undoubtedly overlooked by Lobelia cardinalis Bidens connata earlier authors, some species have probably Xanthium slrumarium spread from the south to Pelee Island recently. Gnaphalium uliginosum Deam (1940) noted at that time that species Hke Tussilago farfara Senecio glabellus and Eclipta prostrata were Tragopogon dubius spreading northward. Ammannia coccinea was 1977 Campbell and Reznicek: Vascular Plant Records, S.W. Ontario 389

reported by Core ( 1 950) and Stuckey ( 1 968) from species encountered in 1974 and 1975 were the north shore of Ohio, and has now reached Ammannia coccinea, Conobea multifida, Pelee Island and Wheatley. Senecio glabellas has Eclipta prostrata, Cyperus odoratus var. squar- spread to some other Erie Islands as well rosus, and Cyperus erythrorhizos. (Stuckey 1975). The recent floods on Pelee The last three areas mentioned have been Island (1972-73) may well have opened new bare purchased by the Ministry of Natural Resources habitat for these species and possibly others like and the Essex Region Conservation Authority. Conobea multifida and Cyperus spp. These are currently designated as Provincial A number of the rare species reported upon Nature Reserves. We are hopeful that these areas are concentrated in several of the outstanding will remain protected from all destructive uses natural areas left on Pelee Island. Chief among and well buffered from any development. Most

these is the Stone Road savanna (Figure 1), of the species mentioned in this article will be where Chaerophyllum procumbens var. shortii, placed on the Ontario Endangered Plant lists Eupatorium altissimum, Phacelia purshii, and (G. W. Argus, personal communication 1976). Spiranthes magnicamporum occur. On the more wooded edges of this savanna occur Triosteum Acknowledgments angustifolium, Valerianella intermedia, and V. Assistance in the field was gratefully received umbilicata, as well as Ratibida pinnata (Duncan from R. Diebolt, G. Donaldson, G. Francis, 1973) which occurs elsewhere in southwestern J. and M. Harris, M. Harris, R. Mitton, P. Pratt, Ontario but rarely. Brown's Woods or Middle R. Simpson, and D. Perrin, who also prepared Point (Figure contains a rich assemblage of 1) the map. species, including Camassia scil- uncommon Unpublished records were kindly provided by loides, Chaerophyllum procumbens var. pro- W. Botham (R.R. 1, Cottam) and J. K. Morton cumbens, Corydalisflavula, atropur- Euonymus (University of Waterloo). pureus, and Myosotis macrosperma. Assistance with identification and herbarium Both the Stone Road savanna and Brown's records was freely provided by B. Boivin, P. M. Woods are threatened with housing develop- Catling, J. M. Laudenbach, J. K. Morton, J. S. ments in the near future. Pelee Island has some of Pringle, J. H. Soper, and A. A. Wellwood. T. the finest southern plant communities in Duncan (University of Michigan) assisted with Canada, and the loss of any one of these would some identifications, and made available his be serious. unpublished manuscript on flora of the Erie Fish Point (Figure 1) is one of the most Islands. remarkable, and largest, areas of natural wood- The hospitality of John and Molly Harris of land left on Pelee Island. The point has Celtis Scudder, Pelee Island, was most appreciated tenuifolia and Lycopus virginicus as two of its during our field work on the island; we are more interesting southern species, together with greatly indebted. Camassia scilloides, Chenopodium foggii, Part of the field work for this paper was Hydrophyllum appendiculatum, Morus rubra, carried out under contract with Nature Reserves and Myosotis macrosperma. The so-called and Parks Planning of the Ontario Ministry of 'Verbeek savanna' (Figure 1) on Lighthouse Natural Resources and Canadian Wildlife Point contains scattered individuals of Cheno- Service of Environment Canada, and some of the podium foggii, Corydalis flavula, and Euphor- work was supported by a grant to Campbell from bia obtusata. There are also uncommon species the Canadian National Sportsmen's Show. associated with these, such as Allium cernuum, and a fine stand of Fraxinus quadrangulata, probably the best representation in Canada. Literature Cited The flooding of the north-central portion of Billings, B., Jr. 1862. List of plants observed growing principally within four miles of Prescott, C. W., and for the Lighthouse Point (Figure 1) has created 'Lake most part in 1860. Annals of the Botanical Society of Henry' and attendant large areas of drying shore- Canada 1: 114-140. line. On the drying shores occurs a most Boivin, Bernard. 1953. Additions to the flora of the Erie interesting early successional flora. Notable Archipelago (Ontario). Rhodora 55: 224-226. 390 The Canadian Field-Naturalist Vol. 91

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Duncan, Thomas and Ronald L. Stuckey. 1 970. Changes in and University of Michigan Herbarium, Bloomfield Hills, the vascular flora of seven small islands in western Lake Michigan, Bulletin 55. Erie. Michigan Botanist 9: 175-200. Wagner W. H., Jr. 1974. Dwarf Hackberry (Ulmaceae: Fernald, M. L. 1950. Gray's manual of botany. 8th edition. Celtis tenuifolia) in the Great Lakes region. Michigan American Book Company, New York. Botanist 13: 73-99. Gaiser, Lulu O. and Raymond J. Moore. 1966. A survey of Wahl, H. A. 1954. A preliminary study of the genus the vascular plants of Lambton County, Ontario. Plant Chenopodiiim in North America. Bartonia 27: 1^6. Research Institute, Canada Department of Agriculture, . Received 31 May 1977 Gleason, Henry A. 1952. The new Britton and Brown Accepted 25 September 1977