1961] 



BOTANY OF THE GUAYANA HIGHLANDS — PART IV (2) 



65 



puberulent within about the middle ; lobes becoming reflexed, glabrous, broadly 

 asymmetric-obovate, about equal to the tube in length, 8-11 mm wide, folded in 

 bud, the apex of the bud appearing ovate, obtuse. Stamens inserted at about 

 the middle of the corolla-tube, the anthers attached by their backs for about 1.7 

 mm, glabrous, sagittate, slender, 3.5-3.7 mm long, the basal lobes 0.5 mm long, 

 obtusish or at least not finely pointed, the apex not exserted, short-filamentous. 

 Ovary glabrous, obtuse at the apex, the nectary crateriform, entire, adnate 

 to the ovary, 0.8 mm high ; clavuncle 0.8 mm high, the collar 0.7 mm broad, the 

 apiculi short, blunt. 



VENEZUELA: Amazonas: locally frequent in Sabana Manacal, Rio Atabapo, 15 km 

 above Guarinume, alt. 125 m; shrub 0.3-1 m, corolla white with yellow throat; 12 Jun 

 1959, J. J. Wurdaclc <$• L. S. Adderley 42965 (holotype, NY). Rio Siapa, Casiquiare, along 

 lower part of Cano Hechimoni, 8 km above mouth of Rio Siapa, alt. 100-130 m; small 

 tree, corolla white, the throat yellow; 9 Feb 1954, Bassett Maguire, J. J. Wurdaclc $ G. S. 

 Bunting 37612 (paratype, NY). Frequent along Cano Temi just above Yavita, alt. 130 m; 

 spare tree 2-4 m, corolla white with yellow throat, "palo de boya"; 11 Jun 1959, Wurdack 

 4- Adderley 42936 (paratype). 



The collection 37612 has much broader leaves than those of the type, longer, 

 and sublanceolate rather than oblongish. 



The leaf-shape of T. tenuis suggests T. rimulosa Woodson, and the two spe- 

 cies are probably closely related. But the leaves of our plant are much smaller, 

 and the stems and other parts are comparatively very slender. 



LEGUMINOSAE — MIMOSOIDEAE 6 



Calliandra resupina Cowan, sp. now Fig. 45. 



Arbuscula resupina, ramulis dense albo-villosis, stipulis deciduis, 9-10 mm 

 longis, ca. 3 mm latis, lanceolatis, acutis, dense albo-villosis extus, intus glabris. 

 Petiolus 3-5 mm longus, albo-villosus, rhachi (0-)9-10 mm longa, villosa; pinnae 

 (l-)2-jugatae, 5-5.5 cm longae, elliptico-oblongae, foliolis 18-21-jugatis, ses- 

 silibus oblongis, rigidis, ad basim truncato-obtusis, ad apicem obtusis, pinnarum 

 medio laminis 8-10 mm longis, ca. 2.5 mm latis, glabris nitidisque supra, infra 

 albo-villosis, marginaliter eiliatis recurvatisque, costa valde excentrica, plana 

 supra, infra salienti, venis obscuris. Inflorescentiae axillares et terminales, 

 capitatae, pedunculo 22-33 mm longo, albo-villoso, bracteis ca. 7 mm longis, 

 albo-villosis extus, intus glabris. Perianthium albo-sericeum extus, rubrum, 

 calycis tubo campanulato, 2 mm longo, lobis triangularibus, 1 mm longis, petalis 

 ca. 5 mm longis, ad apicem obtusis. Filamenta 21 mm longa, glabra. Gynoecium 

 et fructus ignota. 



VENEZUELA : Bolivar : occasional on rocky slopes and elevations in drainage of Rio 

 Aponguao, alt. 1200 m, Gran Sabana; repent or trailing shrub; fls bright red; 27-28 Mar 

 1952, Bassett Maguire 33643 (holotype, US No. 2281820). 



C. resupina (resupinus: "lazy," in allusion to the decumbent habit of the 

 plant) is most nearly related to C. tsngoides and C. rigida from Venezuela and 

 British Guiana respectively; all three species are morphologically quite similar 

 to such south Brazilian species as C. hirsuticaulis and C. calycina. The new spe- 

 cies and its closest (both geographically and morphologically) relative, C. 

 tsngoides may be distinguished by the following key: 



1. Stipules 5 mm long, 1 mm wide, obtuse; pinnae 2-4-jugate, the leaflets 35-45- 



jugate, glabrous, ecostate. Filaments 40 mm long. C. tsngoides. 



Richard S. Cowan. 



