386 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VOL. 13, No. 17 
Calyx lobes alternating with aculeate bristles or teeth. 
Branchlets covered with a hairy purplish indument; leaves ovate, broad at 
the base and with acute apex; calyx tube slightly villous. 
3. C. anisandra Cogn. 
Branchlets glabrous or slightly hairy. 
Leaves sessile, not ciliate, covered as is the calyx with white glandular 
COLE. «... » ining: buco bx sh ee oon s'e 4. C. sessilis Pittier. 
Leaves distinctly petiolate. 
Flowers almost sessile, the petals ovate and acuminate; leaves with 
crenulate and ciliate margin................ 5. C. alpina Cogn. 
Flowers pedicellate, the petals obovate and obtuse; leaves entire. 
6. C. microphylla Cogn. 
Tibouchina brachyanthera Pittier, n. sp. 
Fruticosa, caule tereti, ramis ramulisque longe denseque squamoso-villosis, 
cortice deciduo; ramulis erectis; foliis petiolatis, coriaceis, rigidis, supra 
obscure viridibus subtus flavicantibus; petiolo longe denseque squamoso- 
villoso; laminis ovato-lanceolatis, 5-nerviis, basi rotundatis, apice apiculatis, 
supra inter nervos adpresse villosa, subtus nervis exceptis squamoso-villosis 
sparse villosis, margine dense villoso-ciliatis; nervis marginalibus supra 
obsoletis, subtus tenuibus, 3 interioribus supra valde impressis, subtus 
prominentibus; floribus majusculis, subsessilibus, ad apices ramulorum aggre- 
gatis; bracteis obovatis, acutis, densissime adpresse canescenterque squamosis, 
supra medium connatis, interioribus quam exteriorum pars libera longioribus; 
calycis tubo basi glabro, apice squamis magnis lanceolato-apiculatis mar- 
ginibus setuloso-serrulatis coronato; segmentis rigidis, lanceolato-triangulari- 
bus, apice longe apiculatis, extus creberrime adpresse hispidis, tubum aequan- 
tibus; petalis obliquis, late obovatis, apice rotundatis, sparse ciliatis; stamini- 
bus paulo inaequalibus, filamentis glabris, antheris brevibus, subattenuatis 
vix arcuatis, connectivo glabro basi producto, bilobato; ovario elongato- 
oblongo, basi glabro, 5-sulcato, apice longiuscule canescenti-setuloso; stylo 
filiformi, longiusculo, glabro, superne arcuato; capsula matura deest. 
Petiolus 2-5 mm. longus; laminae 3-5 ecm. longae, 1.3-2 cm. latae. 
Bracteae exteriores circa 4 mm., interiores 6—-6.5 mm. longae. Calycis tubus 
6-7 mm. longus, segmentis 6.5 mm. longis, 2.2 mm. latis. Petala circa 12 mm. 
longa, 9 mm. lata. Staminum filamenta 6-7 mm. longa; antherae 4.5 mm. 
longae, connectivo infra loculos 1-1.5 mm. longo. Ovarium 5 mm. longum, 
1.5-2 mm. crassum; stylus 13.5 mm. longus. 
VENEZUELA: Torococo, Trujillo, 1100 m., in sunny spots, fl. January 11, 
1922, Jahn 755 (type). 
This species, which, is apparently the third known of the group of the true 
Tibouchinae, differs from T'. aspera Aubl. and its varieties in the form and 
indument of its apiculate leaves, the very short bracts, the calyx segments 
equal to the tube, the smaller petals, and the shorter stamens, as well as by 
the general appearance. It is at once distinguished from 7’. spruceana Cogn. 
by its 5-nerved leaves, and likewise by its smaller petals, which are ciliate at 
the apex, its shorter ative, etc. The three species of the section are found 
in Venezuela and are distinguished one from the other by the following 
characters: 
