1960] 



BOTANY OF THE QUAY AN A HIGHLAND PART IV 



33 



The solitary flowers of this species separate it from all others in the genus ; 

 the strongly hispid character of the vegetative parts is also distinctive. 



8. Raveniopsis linearis (Gleason) Cowan, comb. nov. Fig. 14. 



Bauenia liriearis Gleason, Bull. Torrey Club 58:375. Jun 1931. 



VENEZUELA: Summit of Mount Duida, alt. 1050-1657 m, Dec 1929, G. H. H. Tate 531 

 (type collection); same locality, Steyermarlc 58133 (NY), 58212 (NY). 



Endemic to Cerro Duida, at 1050-1675 m elevation, along the banks of 

 streams. 



This is by far the smallest-flowered species, and the size and shape of the 

 leaves furnish further distinguishing characteristics. 



9. Raveniopsis tomentosa Gleason, Brittonia 3:167. Oct 1939. Fig. 18. 



VENEZUELA: Bolivar: Auyan-tepui, alt. 2200 m, G. E. H. Tate 1362 (type collection, 

 NY); same locality, Canlona 2663 (NY, US). 



Apparently endemic to Auyan-tepui. Venezuela. 



The pubescence of this species is dendroid-stellate with the branches more 

 or less evenly distributed along the main axis of the hair. In respect to pub- 

 escence at least, R. peduncularis is the closest relative; in that species the central 

 axis, of the hairs is not developed and a stalked, many-armed, star-shaped form 

 results. The form of the inflorescence and flower parts, as well as vegetative 

 differences, separates the two species. 



10. Raveniopsis peduncularis Pittier & Lasser, Bol. Soc. Venez. Ci. Xat. 9:121. 

 1944. Fig. 16. 



Shrub 1-3 m tall, the branchlets densely and darkly rusty-brown-stellate- 

 pubescent. Leaves simple, rigid, strongly discolorous, the petioles stout, 4—10 

 mm long, densely brown-stellate-pubescent, the blades (3.5-) 5.5-8.5 cm long, 

 ( 1.5- ) 2-4.5 cm wide, elliptic to ovate to narrowly ovate, obtuse basally, the apex 

 acute, often with a mncro to 2 mm long, the upper surface at first densely grayish- 

 stellate-pubescent but soon glabrescent and then nit id and distinctly green 

 when fresh, the lower surface densely rusty-stellate-pubescent, the costa im- 

 pressed above but strongly salient beneath, the venules plane and subobscure 

 above, prominulous beneath. Inflorescences spicate. dichasial, densely rusty- 

 stellate-pubescent, the peduncle arising in the upper axils. 2.5-4 cm long, the 

 two unilateral branches to 5 cm long. Flowers orange-red, sessile, rusty-stellate- 

 pubescent externally, the calyx densely so; sepals strongly unequal, obtuse, 

 more or less joined very shortly at the base, the two largest 4 mm long, 1.5 mm 

 wide, oblong-lanceolate, the remaining three sepals 2-3 mm long, ca. 1 mm wide, 

 glabrous within except at the apices ; corolla tube slightly arcuate, 8-11 mm long, 

 villose within, the limb strongly unequal, the upper lip entire. 7 mm long, 2 mm 

 wide, lanceolate, the lower lip 4-lobed. the lobes lanceolate-oblong, ca. 3.5 mm 

 long. 1 mm wide. Filaments of the two fertile stamens 12 mm long, villose, the 

 fertile anthers oblong, ca. 2 mm long, glabrous, the staminodia 10-13 mm long, 

 villose. Disk shallowly eupulate, 0.6 mm deep, 1.5 mm in diameter, completely 

 enclosing the glabrous ovary, the style glabrous, 7 mm long, tapering apically 

 to the digitate stigma. Cocci of the fruit rusty-red-stellate-pubescent, venose, 

 apiculate, ca. 3 mm long, 2 mm wide, the seed minutely verruculose. reniform. ca. 

 2 mm long, 1 mm wide, dark brown. 



