1960] 



BOTAXY OF THE GUAYAXA HIGHLAND PART IV 



31 



usque ad subappressos). infra dense flavo-serieeae, ad marginem valde revolutae, 

 costa venis primariisque eonspieue impressis supra, infra valde salientibus. In- 

 floreseentiae eymiformes, terminales. flavo-serieeae. peduneulo 20-35 mm longo, 

 flavo-serieeo. peduneuli apiee unum florem terminalem et duos ramos raeemi- 

 formes ea. 10-20 mm longos ferenti. Calyx dense serieeus, sepalis 2, late elliptieis. 

 acutis, 3-3.5 mm longis, 2-3 mm latis, sepalis ceteris linearibus. 2.5-3 mm longis. 

 0.5-0.7 mm latis. Corolla serieea extus. intus in fauee minute lanulosa. tubulari- 

 mfundibuliformis, tubo 5.5 mm longo, lobis inaequalibus, ea. 3 mm longis, 1-2 

 mm latis. anguste oblongis et anguste ovafis. Stamina fertilia 2, filamentis 

 ligulatis, 0.5 mm. longis, glabris, antheris oblongis, 1.2 mm longis. flabellato- 

 appendiculatis, staminodiis 4. linearibus. pilosis. Stylus 2.5 mm longus, glaber; 

 ovarium quinquelobatum, disco cupulari immerso. Fructorum cocci, sericei, 

 oblique ovati, ea. 4 mm longi, 3 mm lati ; semen papillatum. nigrum, ea. reni- 

 forme, 2 mm longum. 



YEXEZI'ELA : Bolivar: northwest cumbres, Churi-tepui (Muru-tepui) , frequent in lower 

 part of lower cumbre, alt. 2100-2200 m; shrub 0.5-2 m; corolla very light pink, with a pink 

 stripe centrally outside on each lobe; 24 Jan 1953, John J. Wurdack 84180 (holotype, XV; 

 same locality and collector, alt. 2300-2500 m, 34297 (paratype, XY, US). 



The nearest relative of this species is R. fraterna, which differs in having a 

 longer corolla tube and sepals of a different shape, and the pubescence on the 

 under surfaces of the leaves is different. R. paruana is another, more distant, 

 relative ; it differs in having bright orauge-red flowers which are borne singly 

 at the tips of the sprawling branches; the type and distribution of the pubescence 

 are also distinctive. 



5. Raveniopsis fraterna Cowan, sp. nov. Fig. 13. 



Arbusculae 1-1.5 m altae. ramulis dense tomentosis. Folia simplicia, rigida. 

 petiolis 2-3 mm longis, tomentosis; laminae 20-28 mm longae. 10-17 mm latae. 

 elliptieae usque ad ovales, obtusae ad apieem basemque, longo-pilosae sed mox 

 glabrescentes supra, infra dense tomentosae. ad marginem valde revolutae. eosta 

 venis primariisque valdissime impressis supra, infra valde salientibus. Tnflor- 

 escentiae terminales, racemosae, peduneulo 6-20 mm longo, tomentoso. Calyx 

 tomentosus usque ad serieeo-tomentosum. 2 sepalis oblanceolatis usque elliptieis. 

 acutis, 5.5 mm longis, 3 mm latis, sepalis ceteris laneeolato-linearibus. 5 mm 

 longis, 0.8 mm latis. Corolla tomentella extus. intus in fauee puberula. tubulari- 

 infundibuliformis, tubo 9 mm longo, lobis inaequalibus. 3-4.5 mm longis. 2-4 mm 

 latis. oblongis vel suborbicularibus. Stamina fertilia 2. antheris oblongis, 1.5 mm 

 longis, appendicibus flabellatis, 0.5 mm longis, staminodiis 5, basilariter pilosulis, 

 ea. 2 mm longis, linearibus. Stylus 8 mm longus. glaber : ovarium quinouelo- 

 batum, in disco cupulari inclusum. Fruetorum cocci pilosa ad apieem. 4.5 mm 

 longi. ea. oblongi ; semen eehinato-papillatum, fuscum, oblongum 3 mm longum. 



YEXEZUELA: Bolivar: Torono-tepui, Chimanta Massif, summit at edge of escarpment 

 in and among zanjones, alt. 2165-2180 m; shrub 1-1.2 m, locally frequent; lvs spreading, sub- 

 coriaceous, revolute, dark green above with sulcate veins, grayish-buff below with elevated 

 veins; calyx dull green; corolla tube whitish with dull lilac, the lobes white inside and flushed 

 pale lilac outside; 9 Feb 1955, J. A. SteyermarJ: $ J. J. WurdacJ: 646 (holotype, XT); Cen- 

 tral Section, Chimanta Massif, open forest on laterite deposit above swamp following east 

 branch of headwaters of Rio Tirica, alt. 2150-2200 m, 12 Feb 1955, SteyermarJ: # Wurdack 

 811 (paratype, XY, US) ; Chimanta Massif, along edge of ridge at summit of east-central 

 portion of summit of Apacara-tepui, alt. 2450-2500 m, 21-22 Jun 1953, SteyermarJ: 75905 

 (paratype, XY'). 



