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Novelties in Bunchosia (Malpighiaceae)

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Novelties in Bunchosia (Malpighiaceae) SystematicBotany (1983), 8(3): pp. 269-276 C Copyright1983 by the American Society of Plant Taxonomists Novelties in Bunchosia (Malpighiaceae) FREDERICK H. DOBSONIII P.O. Box 71, Huntington,Vermont 05462 ABSTRACT. Bunchosia quaesitor has inflorescencesterminating main axes, a characteristicunique to this endemic to southwesternHaiti. Bunchosia pauciflora fromnorthern Haiti was confused by Niedenzu with B. haitiensisUrban & Niedenzu, but B. haitiensisis two-carpellatewith a glabrous oyaryand connate styles,and B. pauciflorais three-carpellatewith a pilose ovary and distinctstyles. Bunchosia articulata, endemic to Cuba, is distinguished from its closest relative, B. swartziana Griseb.,by its petals with glandular limb margins,basally articulatedpeduncles, and elliptic leaf blades. Bunchosia macilenta, fromBahia, Brazil,can be divorcedfrom Bunchosia acuminata,another new species fromthe same region, by its smaller, more meagre inflorescenceswith fewer flowers and smaller leaves with 4-6 abaxial glands. Bunchosia systyla (Niedenzu) Dobson was originally described as a formof B. fluminensis(Griseb.) Griseb. but is given species status here. NEW ANTILLEAN TAXA 2 mm long, 1.7 mm diam., the styles connate in the bud. Fruitsnot seen. Bunchosia quaesitor Dobson, sp. nov. (fig. 1).- This species is endemic to southwesternHai- TYPE: Haiti, Massif de la Hotte, Western ti. The specificepithet quaesitor, "the searcher," Group,Pestel on the road to Delcour, "hard is dedicated to ErikLeonard Ekman (1883-1931), limestone,ca. 400 m, rare shrub,puzzling, whose field work is responsible for much of flowers not well developed, yellowish. I what we know of the flora of Haiti. The type really ought to had stayedhe&re and looked is the only known collection. Unfortunately, for more but we wanted to reach Delcour the specimen had only one mature flowerand and it was late," 26 Aug 1927, E. L. Ekman that lacked petals and stamens; its style was H 8976 (holotype: S!). broken off,but the three-carpellateovary was Inter omnia species inflorescentiistermina- preserved (fig. 1). Niedenzu examined this libus axibus principalibusinsignis, inflorescen- specimen in 1929 and placed it in B. punicifolia tiis simpliciter racemosis paucifloris eglandu- (annotation label on specimen), another Hai- losis, ovario 3-carpellatoglabro. tian endemic. This species is easily distin- Shrubs. Branchletsgreen, with minute, scat- guished fromB. punicifolia,however, by inflo- tered, T-shaped trichomes 0.2-0.25 mm long. rescencesterminating main axes and by bearing Older branchessoon glabrous and whitishwith primarybracteoles, a glabrous ovary, broadly a corkysurface, the lenticels neitherprominent elliptic leaves with minute glandular apical si- nor conspicuous. Leaf blades elliptic, 2.5-5 cm nuses, and two conspicuous abaxial glands on long, 1.5-3 cm broad, the base obtuse, with a the lower third of the lamina (fig. 1). Inflores- minute shallow glandular sinus at the obtuse cences terminatingthe main axes is a charac- apex, the blades with 2 conspicuous circular teristicunique to this species. abaxial glands on the lower third,dark green, glabrous and with 3-5 pairs of evident lateral veins above, paler and glabrous beneath, the Bunchosia pauciflora Dobson, sp. nov. (fig. marginsbarely revolute.Petioles 2-3 mm long, 2).-TYPE: Haiti, Massif du Nord, Anse-a- glabrous or with scatteredtrichomes. Inflores- foleur, Morne Cheneau, steep mountain- cences simple-racemose,eglandular, with scat- side, ca. 600 m, "Same as m. Brigand plant. tered trichomes,terminal on the main axes, 2- Obs. All Bunchosia blacken the paper in 4-flowered,2 primarybracteoles at the base of 'which they lie," 25 Jun 1925, E. L. Ekman the inflorescenceaxis, the axes 9-11 mm long, H 4396 (holotype:S!; isotypes:IJ!, NY!, TEX!, the secondary bracteoles to 1 mm long, the pe- US!). duncles basally articulated,to 3.5 mm long, the Inflorescentiis axillaribus simpliciter race- tertiarybracteoles up to 1 mm long from the mosis paucifloriseglandulosis, habitu simili B. articulation.Sepals triangular,2.5-3 mm long, haitiensissed ab eo ovario 3-carpellato piloso ciliate, the glands 8, 1.5-2 mm long. Petals and stylisdistinctis facile distinguendo. stamens not seen. Ovary 3-carpellate,glabrous, Shrubs 1.5-2 m high. Branchletsappressed- 269 270 SYSTEMATIC BOTANY [Volume 8 /0 d~~~~~~~~~~~~~~~~~~~~~~. I L FIG. 1. Bunchosiaquaesitor. a. Habit (scale 1 cm). b. Abaxial leaf surfaceshowing glands on the lower 1/3 of the lamina and the glandular sinus at the apex. c. Inflorescenceterminal on the main axis, note the primarybracteoles at the base of the inflorescenceaxis. d. Detail of indumenton inflorescenceaxis. Relative size of cut-outis indicated by two parallel lines on the whole structurein c. e. Sepal with glands (abaxial view). f. Transverse section near base of 3-carpellate ovary. Scales for b and c= 5 mm; e and f = 1 mm. Drawn fromthe holotype, EkmanH 8976. There has been some restorationof flowersto the naked axis on the specimen. 1983] DOBSON: BUNCHOSIA 271 / [ b. FIG. 2. Bunchosiapauciflora. a. Habit (scale= 1 cm). b. A portion of inflorescenceaxis showing two floweringpeduncles (in bud). c. Indument on the inflorescenceaxis. Relative size of cut-outc is indicated by two parallel lines on the whole structurein b. d. Sepal with glands (abaxial view). e. Petal with erose limb margin (drawn from bud). f. Pistil, note appressed-pilose ovary and connivent styles (drawn from bud). g. Fruitingpeduncle, note persistentstyle bases. Scales for b, e, and g = 5 mm; for d and f, 1 mm. a- f fromthe holotype; g fromEkman H 2865. 272 SYSTEMATIC BOTANY [Volume 8 pilose (T-shaped, rust-coloredtrichomes 0.28- distinguish B. paucifloraare its two- to four- 0.55 mm long). Older branches glabrous and flowered inflorescences,fruits with three dis- lenticellate. Leaf blades elliptic to obovate, 2- tinct persistentstyle bases, and northern dis- 8.5 cm long, 1-3.5 cm broad, the base acute to tribution. shortlyattenuate, apex acute, the blades with 2 minute abaxial glands near the margin on the Bunchosia articulataDobson, sp. nov. (fig.3).- lower third,green glabrous and with 3-4 pairs TYPE: Cuba, Havana, hill near Mariano, of evident lateral veins above, paler green, gla- about 8-10 ft high, 25 Jun 1908, Leon 527 brous but the midvein with scatteredtrichomes (holotype: NY!). beneath, the margins barely revolute. Petioles Inflorescentiis axillaribus simpliciter race- glabrescent,2-5 mm long, the stipules to 1 mm mosis, pedunculis florum5-9 mm longis basi long inconspicuous. Inflorescences axillary, articulatis,petalis tertiusvel quartus interiori- simple-racemose, leafless, eglandular, ap- bus glandulosis prope unguem et margine pe- pressed-pilose or with scatteredtrichomes, the tali intimibasaliter vel omnino glandulosis. primarybracteoles absent, axes 1.3-3.5 cm long, Shrubs or trees 2-4 m high. Branchletswith 2-4-flowered, the secondary bracteoles 1-1.5 scatteredT-shaped trichomes0.26-0.7 mm long mm long, the peduncles basally articulated2.5- to glabrescent. Older branches glabrous and 4.5 mm long, the tertiarybracteoles paired 1- lenticellate.Leaf blades elliptic to obovate, 3.5- 1.5 mm long from the articulation. Mature 12 cm long, 1.5-5 cm broad, the base acute to flowers not seen. Flower buds 3-4 mm diam. shortly attenuate, the apex obtuse to shortly Sepals triangular,3-3.8 mm long, ciliate, the acuminate,sometimes retuse-tipped, the blades glands 8, 2-2.5 mm long. Petals, all 5 with erose with 2(-4) abaxial glands abuttingthe midvein limb margins,3.5-4 mm long, the.claws 1.5-2 fromthe base up to the lower 1/3 of the lamina, mm long, the limbs 2-3 mm long, 2-3 mm diam. glabrous and with 3-5 pairs of evident lateral Stamens 2.5 mm long, connate for 1/3 their veins above, glabrescentbeneath, the margins length,anthers 1 mm long, the connective yel- barelyrevolute. Petioles glabrous,5-9 mm long, low. Pistil up to 3 mm long, the ovary 3-car- the stipules to 1 mm long, inconspicuous. In- pellate, appressed-pilose, 1-1.5 mm long, 1-1.5 florescencesaxillary, simple-racemose, leafless, mm diam., the stylesconnivent with persistent with scattered trichomes, the primary brac- bases. Fruits,9-13 mm long, 8-11 mm diam., teoles absent, the axes 2.5-8 cm long, 4-10- with widely scattered,minute trichomes or gla- flowered,the secondary bracteoles 0.7-2.5 mm brous. Seeds 3, or 2 by abortion. long, the peduncles basally articulated5-9 mm Other specimensexamined. Haiti, Massifdu long, the tertiarybracteoles paired, 1-1.5 mm Nord, Bayeux, Morne Brigand, E. L. EkmanH long from the articulation,one or neither of 2865 (A, IJ,NY 2, TEX, US). the pair glandular. Mature flowers 13-22 mm Bunchosiapauciflora is presumablyendemic to diam. Sepals ovate, 2.5-4 mm long, ciliate, the northernHaiti. Niedenzu examined the holo- glands 8, 1.5-2 mm long. The 4 outermostpet- typein 1926 (annotationlabel on specimen) and als with erose limb margins,or the 3rd and 4th placed it in B. haitiensis,which is two-carpellate inner, glandular near the claw, 7-10 mm long, with a glabrous ovary and connate styles; the claws 2.5-4 mm long, the limbs 5-7 mm whereas B. pauciflorais three-carpellatewith an long, 5-8 mm diam., the innermost 7-10 mm ovary that is appressed-pilose and has conni- long, the claw 3-4 mm long, the limb basally vent styles.Niedenzu and Urban indicated two to completelyglandular, the limb 4-6 mm long, connate stylesin B. haitiensis(1921) in the orig- 4-6 mm diam. Stamens 3-4.5 mm long, connate inal description,but in 1928 Niedenzu emend- for 1/4to 1/2their length, the anthers 1.2-1.6 mm ed and described the ovary as three- long, the connectiveyellow. Pistil4-5 mm long, locular and glabrous and cited the following the ovary3-carpellate, glabrous, 1.5-2 mm long, specimens: E. L. EkmanH 488 (type of B.
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