1963] 



BOTANY OF THE GUAYANA 1 1 10 II LANDS PART V 



193 



stylis 5.5-13 mm longis ; staminibus prope medium Yel supra medium corollae 

 insertis ; capsulis 8-17 mm longis. 



A variation with the leaf -blades all markedly narrowed to a cuneate base and 

 of a narrowly oboYate or spatulate-oboYate shape, and 2 1 /2-3 1 /2 times as long as 

 broad, is exemplified by Maguire 33700 from savannas near Kavanayen, Ven- 

 ezuela. It is a distinct variety ; 



Chalepophyllum guianense Hook, f . var. cuneatum Steyermark, var. nov. 



A var. guianense foliis plerumque spatulato-obovatis vel anguste obovatis basi 

 in petiolum 3-5 mm longum prominenter cuneatis 2.5-7 em longis 1.3-3.5 cm 

 latis 2 1 /2-3 1 /2-pl° longioribus quam latioribus recedit. 



VENEZUELA. Bolivar: near Kavanayen; frequent in savanna; alt. 1300 m; 

 shrub 5-15 dm high; flowers white; 30 Mar 1952, Bassett Maguire 33700 (holo- 

 typeNY). 



Chalepophyllum longilobum Steyermark, sp. nov. Fig. 70, A-F. 



Frutex ad 4-metralis ; foliis suborbiculari-obovatis vel suborbicularibus apice 

 rotundatis basi rotundatis vel snbobtusis subrevolutis 2.5^1.5 cm longis 1.5-4 cm 

 latis subsessilibus in petiolum 1-2 mm longum contractis supra glabris nitidis 

 subtus tessellato-ruguloso-areolatis pallido-tomentellis ; floribus solitariis vel in- 

 florescentiis ad 4.5 cm longe pedunculatis cum 3-4 floribus; calycis tubo turbinato 

 3 mm longo 2.5-3.2 mm lato, laciniis subaeqnalibus vol valde inaequalibus ovato- 

 lanceolatis vel oblongo-lanceolatis acutis vel obtusis 2-6.5 mm longis 1-2 mm 

 latis parce hirtello-ciliolatis ; corolla elongata infundibuliformi variabili, tubo 

 13-14 mm longo basi 4.5 mm lato apice 8-9 mm lato intus fauce dense villosa 

 pilis ad 2 mm longis basi papillato 3 mm aliter villosulo vel puberulo, lobis 

 elliptico-oblongis acuminatis 14-15 mm longis 5.5-6 mm latis; antheris 3 mm 

 longis; filamentis liberis 2 mm longis paullo supra medium corollae tubi insertis 

 ad basin adnatis ; stylis 6-13 mm longis glabris; stigmatibus lanceolato-oblongis 

 obtusis 1.8-2 mm longis ; capsulis 7-11 mm longis 5-7 mm latis ; seminibus 2.8-3 

 mm longis 2.2 mm latis rugoso-alveolatis anguste alatis. 



BRITISH (Jl'IAXA. Between Ayanganna and Chinowieng, Jit. Ayangamia, 

 Pakaraima Mountains ; occasional at forest edges ; alt. 100-1200 m ; shrub 4 m 

 tall; flowers white; 7-8 Feb 1955, Bassett Maguire, W. M. C. Bagshaw, & Celia 

 K. Maguire 40637 (holotype NY). 



This species is distinguished from C. guia^iense by the longer corolla-lobes 

 which are as long as or longer than the corolla-tube. The seeds are 2.8-3 mm long, 

 whereas in C. guianense they average 3-4 mm long with a broader Aving. The 

 depressions of the areolae on the lower surface of the leaves in C. longilobum 

 have the papillae shorter and the ridges less hairy than in C. guianense, producing 

 a more whitened, less tomentose appearance. 



Key to the Species of Clialepopliyllum 



1. Corolla-lobes as long as or longer tlian the corolla-tube, 14-15 mm long. C. longilobum. 

 1. Corolla-lobes shorter than the corolla-tube, 6-12 mm long. 



2. All or nearly all leaves spatulate-obovate to obovate, distinctly narrowed to a 



cuneate base, 2 1 / £-3V£ times as long as broad. C. guianense var. cuneatum. 



2. Leaves oval-oblong to suborbicular to oblong obovate, rounded to narrowed at 

 the base, nearly as broad as long to 2 or 2y> times as long as broad. 



C. guianense var. guianense. 



