1961] 



BOTANY OF THE GUAYANA HIGHLANDS PART IV (2) 



11 



5. Sepals acute; flowers 4 cm or less in diameter; branchlets wiry, 1.5-2.5 mm in 

 diameter. 



6. Leaves narrowly linear-lanceolate, 3-6 mm broad, 3-6 cm long, totally devoid 



of an arista; sepals elliptic, 4-5 mm wide, 11-13 mm long. T. linearis. 



6. Leaves elliptic, 6-15 mm broad, 3-7 cm long, strongly aristate; sepals narrowly 



lanceolate, 2-3 mm wide, 18-20 mm long. T. aristata. 



Tyleria spectabilis Maguire & Wurdack, sp. nov. Fig. 25 E. 



Arbor parva ad 15 m altam, 20 cm diam. ; ramis adscendentibus candelabri- 

 formibus crassis, 12-15 mm diam. ; internodiis brevissimis, 1-2 mm longis, 

 cicatricibus foliorum et stipularum prominentibus ; stipulis tarde deciduis ; f oliis 

 rubritinctis, subcoriaceis, sessilibus lanceolatis 10-15 cm longis, 15-30 mm latis, 

 ad apicem anguste acutis in arista 5-7 mm longa productis, multivenatis, venis 

 ad 80° angulnm adscendentibus; margine integra rubro-brunnea scariosa, tarde 

 lacerata deciduaque, ad apicem item minute spinulosa ; stipulis castaneis valde 

 inaequalibus, parviore lanceolato- acuminata 1.5-2.0 cm longa, maiore oblongo- 

 lanceolata, acuminata 4.0-5.0 cm longa aristata; inflorescentiis multifloribus 

 ample paniculatis roseis vel subrubris, pyramidalibus, 12-18 cm longis, 10-15 cm 

 latis, bracteolis primariis et secondariis 4-20 mm longis, linearibus, integris 

 vel laceratis caducis; pedicellis tenuibus in anthesi 8-15 mm longis, demum ad 

 30 mm longos ; sepalis plus-minusve aequalibus 4-5.5 mm longis, oblongis obtusis 

 ad apicem conspicue glandulari-scariosis ; petalis elliptico-oblongis, obtusis, 15- 

 20 cm longis 8-12 mm latis, roseis ; androgynophoro ca. 2 mm alto ; corona 1- 

 cyclica, staminodiis 5, oblongo-oblanceolatis 2-3 X 6-7 mm, ad apicem minute 

 irregular iter que crenulatis, carina ventrali prominenti, appendicibus alternatis 

 profunde laceratis 1-4 segmentis linearibus, aristatis, ca. 3-4 mm longis; 

 staminibus 5, sub ze^silibus, ca. 4.5 mm longis, obtusis; ovario conico, 3-loculari; 

 ovulis nuinerosis, placentis profunde intrusis, parietalibus ; stylo simplice integro 

 subulato, stigmate punctiformi; capsula conica, ca. 12 mm longa, stylo per- 

 sistenti; seminibus 2.2-2.5 mm longis, 0.8-1.0 mm latis, testa membrano- 

 alveolata, valde alata. 



VENEZUELA: Amazonas: Cerro de la Neblina, frequent in low intervale forest, slopes: 

 vicinity of Cumbre Cai"p at 1800 m alt.; small tree to 7 m high, branches coarse-ascending; 

 leaves glossy green, reel tinged, in terminal rosettes, ascending in vegetative shoots, patent 

 or reflexed in flowering branches; inflorescence red, petals pink with yellow centers, anthers: 

 deep pink; 4 Jan 1954, Maguire, Wurdack $ Bunting 37033 (holotype, NY). Cerro de la 

 Neblina, in 1954, Maguire, Wurdack $ Bunting 37015, 37092, 37167, 37350 (paratypes) ; in 

 195.7, Maguire, Wurdack $ Maguire 42117, 42274, 42462 (paratypes). 



Distribution : a very handsome candelabra-like tree known only from the 

 cumbre of Cerro de la Neblina. In protected intervale habitats, it becomes a 

 tree reaching nearly fifty feet in height; on exposed summits stature may be 

 reduced to five feet or less. T. spectabilis, surely one of the more beautiful of 

 flowering trees in the American tropics, is obviously most nearly related to 

 T. fioribunda of Cerro Duida, which it closely resembles in habit and 

 form. However, there are differences in leaf margin and apex, as well as critical 

 flower characteristics. 



Tyleria pendula Maguire & Wurdack, sp. nov. Figs. 25H, 26A-K. 



Frutex pauciramosus virgatus gracilis vel arbor parva pauciramosa, 1-8 m 

 alta; ramis tenuibus 3-5 mm diam., nodis vulgo 2-8 mm longis; foliis petiolatis, 

 laminis oblanceolatis vulgo 2.5-4.5 cm latis, 7-11 cm longis, multivenatis, venis 

 ad 45° adscendentibus, margine minute spinuloso-serrulata, apice obtuso vel late 



