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Revised Checklist of the Vascular Plants of Bryce Canyon National Park, Utah

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Revised Checklist of the Vascular Plants of Bryce Canyon National Park, Utah Great Basin Naturalist Volume 41 Number 1 Article 2 3-31-1981 Revised checklist of the vascular plants of Bryce Canyon National Park, Utah Hayle Buchanan Weber State College, Ogden, Utah Robert Graybosch Northern Arizona University, Flagstaff, Arizona Follow this and additional works at: https://scholarsarchive.byu.edu/gbn Recommended Citation Buchanan, Hayle and Graybosch, Robert (1981) "Revised checklist of the vascular plants of Bryce Canyon National Park, Utah," Great Basin Naturalist: Vol. 41 : No. 1 , Article 2. Available at: https://scholarsarchive.byu.edu/gbn/vol41/iss1/2 This Article is brought to you for free and open access by the Western North American Naturalist Publications at BYU ScholarsArchive. It has been accepted for inclusion in Great Basin Naturalist by an authorized editor of BYU ScholarsArchive. For more information, please contact [email protected], [email protected]. REVISED CHECKLIST OF THE VASCULAR PLANTS OF BRYCE CANYON NATIONAL PARK, UTAH Havle Buchanan' and Robert Graybosch- .\bstract.— Prior to 1960, when the senior author wrote a dissertation on the plant ecolog)' of the Paunsaugiint Plateau forests of Brvce Canvon National Park, relatively little plant taxonomic work had been done in the area. A checklist was prepared in 1971 that included 218 species of higher plants. During the field seasons 1978, 1979, and 1980, additional plants were collected during a second plant community study of the forests. The junior author spent the summer of 1980 at the park collecting plants in additional plant communities and organizing the herbarium collection. This checklist includes the additional species collected and updates the nomenclature of the vascular plants presently known to occur within the boimdaries of Bryce Canyon National Park. Bryce Canyon National Park occupies (1966), with the exception of the genera Het- 35,240 acres (55.06 square miles) along the erotheca, Solidago, and Chrysothamnus, southeastern edge of the Paunsaugunt where the nomenclature of Welsh and Moore Plateau in Garfield and Kane counties in (1973) was employed. southern Utah. The elevation ranges from Welsh, Atwood, and Murdock (1978) cited 2027 m (6650 ft) near the town of Tropic to numerous collections from Brvce Canyon. 2775 m (9105 ft) at Rainbow Point. The Some species listed were not located in the Paunsaugunt Plateau is approximately 30 field by the present authors. These are in- miles long by 10 miles wide, occupying a po- cluded in the checklist and are listed as fol- sition midway between 37 degrees and 38 de- lows: grees north latitude 10 miles west of the Erigewn ahdjocnsis ("ronc}. 112th meridian. The annual precipitation at E. compositii.s Pursh park headquarters is 16.56 inches. May and E. vagus Pays. June are the driest months of the year with Lcucelcnc cricokles (Torr.) Greene Plu/saria neuhcrrt/i Gray .94 and .60 inches of precipitation. August is TJieh/podimn sagitiatum (N'utt.i Endl. var. ovciUfolium of the year with 2.35 inch- the wettest month (Rydb.) Welsh and Reveal es precipitation, due to thunderstorms. Snow- Arenariii ntittdllii S. Wats. fall from November through March provides Carex eleocharis L. H. Bailey most of the annual precipitation. iMtlu/nts bracln/caliix Rydb. var. zionis (C. L. Hitchc.) Welsh The checklist includes 446 species of vas- Ltipintis X (ilpcstris A. Nels. cular plants known to occur within the Liiuintliastniin nuttuUu (Gray) Ewan boundaries of Bryce Canyon National Park. Phlox hoodii Richards Nutt. It should not be considered all inclusive, in- Polemonium viscosttm asmuch as additional species will undoubt- Due to the local edaphic and topographic edly be discovered. It is, rather, the state of features, the Bryce Canyon flora is rich in knowledge as of August 1980. The following rare and endemic plants. The following list have served as authorities of nomenclature: includes those plants cited by Welsh (1979) monocotyledons, Cronquist et al. (1977); Fa- whose presence in Bryce Canyon has been baceae, Welsh (1978); Brassicaceae, except documented by the authors, or, in the case of Erysimimi, Welsh and Reveal (1977); lower Erigewn abapensis, other investigators. vascular plants, gymnosperms and remainder Erigewn abajoensis Cronq. of the dicotyledons, Holmgren and Reveal Hetcrotheca joncsii (Blake) Welsh and Atwood 'Department of Botany, Weber State College, Ogden, Utah 84408. 'Department of Botany, Northern Arizona University, Flagstaff, Arizona 86001. 109 110 Great Basin Naturalist Vol. 41, No. 1 Townsendia minima Eastwd. Cymopterus minimus. Phlox gladiformis, Cnjptantha orchrolenca Higgins and Eriogonum aretioides are rare plants Draba subalpina Goodinn. and Hitchc. known from areas close to Bryce Canyon Lesquerella ruhicundula Rollins (Cedar Breaks and/or Red Canyon). Since Silene petersonii Maguire var. minor C. L. Hitchc. & Magiiire these sites are similar to Bryce Canyon both Psoralea pariensis Welsh & Atwood edaphically and topographically, one might Castilleja revealii N. Holmgren expect to find these species in Bryce Canyon. Penstemon bracteatus Keck. Despite extensive search, they have not been located in the Park, thereby making pro- Erigeron abajoensis was cited by Welsh et tection of the existing populations all the al. (1978). We have not seen it in the field. more vital. According to Welsh (1979), Heterotheca In the paper "The Flora of Great Basin jonesii was known from one surviving popu- Mountain Ranges: Diversity, Sources, and lation. The Bryce Canyon collection (Gray- Dispersal Ecology" the flora of Bryce Can- bosch, 924) is, therefore, a significant exten- yon, based on a 1971 checklist of the national sion of the range of this rare plant. One park, was used as a "continental" flora. Of all population was located on a sandy outcrop of the continental floras used in the paper, that the Kaiparowits formation in Bridge Canyon of Bryce Canyon was considered the most de- at an elevation of 2438 m (8000 ft). Identical pauperate. The equation: no. of species = habitat is available throughout the southern 295.4 (log area^ii predicted 460 species for half of the park; yet no other populations Bryce Canyon with 55.06 square miles of have been located. The site is traversed by a area, but only 218 species were reported. hiking trail, presenting the danger of This new checklist includes 446 species, trampling. which closely approximates the predicted Townsendia minima, Draba subalpina, and number of species. Lesquerella rubicundiila are common wher- ever exposed limestone exists. Their "threat- ened or endangered" status might need re- The Vascular Plants of consideration. Cryptantha ochroleuca has Bryce Canyon National Park been observed near East Creek, Inspiration Point, and below Bryce Point. Populations Aceraceae 1. Acer glabrttm Torr. (Rocky Mountain maple). are small and Welsh's (1979) suggestion that 2. A. grandidentatum Nutt. (bigtoothed maple). the species be regarded as endangered is cer- Amaranthaceae tainly justifiable. Psoralea pariensis is repre- 3. Amaranthiis graecizans L. (tumbleweed amaranth). sented only by a few small, scattered popu- lations along the rim of the Paunsaugunt Anacardiaceae 4. Rhus trilobata Nutt. (squawbush). Plateau. Silene petersonii var. minor and Penstemon Apiaceae 5. Cicuta douglasii (DC.) Coult. & Rose (Douglas wa- bracteatus are known in the park only from ter hemlock). the main amphitheater (herein defined as 6. Cymopterus purpureas S. Wats, (purple biscuit- that portion of the park bordered by Bryce root). Point on the south. Tropic and Little Hen- 7. Ligusticum porteri Coult. & Rose (ligusticum). derson Canyons on the north, and from the 8. Lomatium minimum Mathias (Bryce Canyon loma- tium). rim of the Paunsaugunt Plateau to the inter- 9. Lomatium nuttallii (Gray) Macbr. (desert parsley). face of the Wasatch formation with the un- 10. Cymopterus lemmonii (Coult. & Rose) Dom. (pseu- derlying Kaiparowits formation) and from docymoptenis). outcrops of the Wasatch limestone bordering Apocynaceae East Creek. Populations consist of only a few 11. Apocynum androsaemifolium L. (dogbane). scattered individuals. Castilleja revealii is the Asclepidaceae rarest of these plants, known only from the 12. Asclepias asperula (Decne.) Woodson (milkweed). main amphitheater. Maintenance of the few Asteraceae (Compositae) populations is critical because, according to 13. Achillea millefolium L. (yarrow). Welsh (1979), the Reveal paintbrush is 14. Agoseris aurantiaca (Hook.) Greene var. aurantiaca known only from Bryce Canyon. (movmtain dandelion). March 1981 Buchanan and Graybosch: Bryce Canyon Plants 111 15. A. aurantiaca (Hook.) Greene var. purpurea (Gray) 65. Haplopappus armerioides (Nutt.) Gray (gold- Cronq. (mountain dandelion). enweed). 16. A. glmica (Pursh). D. Dietr. var. parviflora (Nutt.) 66. Helianthella uniflora (Nutt.) T & G (helianthella). Rydb. (mountain dandelion). 67. Helianthus annus L. (sunflower). 17. Antennaria dimorpha (Nutt.) T. & G. (low pus- 68. Heterotheca jonesii (Blake) Welsh & Atwood (Jones sytoes). goldenaster). 18. A. parvifolia Nutt. (pussytoes). 69. H. villosa (Pursh) Shinners (goldenaster). 19. A. rosea Greene (rose pussytoes). 70. Hymenopappus filifolius Hook. var. cinereus 20. A. rosulata Rydb. (pygmy pussytoes). (Rydb.) I. M. Johnston (hymenopappus). 21. Arnica chamissonis Less, (woolly arnica). 71. H. filifolius Hook. var. lugens (Greene) Jeps. (hy- 22. A. cordifolia Hook, (heartleaf arnica). menopappus). 23. Artemisia arbuscula Nutt. var. nova (A. Nels.) 72. Hymenoxys acaulis (Pursh) Parker
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