1958] 



THE BOTANY OF THE GUAYANA HIGHLAND PART III 



143 



longi, pilosi ; pinnae unijugatae, petiolo secondario 4-7 mm longo, piloso, rachibus 

 seeondariis 25-40 mm longis, pilosis; foliola 1.5-jugata, 2-nervia (nerviis utrinque 

 prominulis) , eiliata, supra leviter pilosa, infra pilosa praeeipue in nerviis. 

 jugorum snperiornm foliolis ellipticis, falcatis, longo-aeuminatis, base latere 

 inferiore eordato sed latere superiore acuto, 10.5-15 em longis, 3.5-7 cm latis; 

 jugi inferioris foliolum plus minusve ovale vel late elliptieum, acutuim base 

 obtusion, 4.5-7 cm longum, 2-4.5 cm latum ; inflorescentiae eapitatae, pedunculo 

 20-30 mm longo, sparse pilosulo, floribus sessilibus ; calyx 2 mm longns, glaber, 

 striatus; corolla sparse minuto-strigulosa, 10 mm longa, lobis ca. 1.5 mm longis; 

 filamenta 45 mm longa, tubo 14 mm longo connata ; gynoecium et fructus ignotus. 



Type Collection: B. Maguire & L. Politi 28629 (holotype NY), "tree 5 m 

 high, petals white, stamens pink. Mixed montane forest along trail from Base 

 Camp, 125 m, Cerro Sipapo, Terr. Amazonas, Venezuela, Jan 25, 1949." 



Paratopes: same data, and collectors, 28421; mixed montane forest near Intermediate 

 Camp, 600 m alt., Cerro Sipapo, Feb 2, 1949, Maguire $ Politi 28721; at edge of open area 

 on Piedra Tururumeri, elev. 150 m, Eios Pacimoni-Yatua, Yatua, Casiquiare, Feb 4, 1954, 

 Maguire, Wurdack, 4' Bunting 37510. 



The nearest allies of this very distinctive plant are two Ecuadorian species, 

 C. glyphoxylon and C. mbnervosa. The latter has smaller, somewhat differently 

 shaped leaflets with different vestiture, smaller flowers, etc. C. glyphoxylon has 

 shorter petioles, less exserted staminal tube, differently shaped leaflets with less 

 pubescence on them, as well as on the other vegetative parts. 



Calliandra stipulacea Benth. 



This wide-ranging species occurs frequently through the interior of Vene- 

 zuela (Ciudad Bolivar southward), northernmost Brazil, southeastern Colombia, 

 and perhaps eastern Brazil. As with so many legumes having such a diffuse 

 range, there is -considerable variation in some of the morphological characters; 

 in this species it is the vestiture of the leaflets which is most variable. Typically 

 the leaflets are glabrous but not infrequently either the upper or the lower, or 

 both surfaces, are variously pubescent. There does not appear to be any dis- 

 continuity in the pattren. however, and there is no geographical correlation 

 with the morphological variation. 



The following recent collections exhibit some of this instability : 



BRAZIL: Terr, do Rio Branco: occasional, overhanging river above falls, elev. 550 m, 

 Sena Tepequem, Maguire 4' Maguire 40172 ; Vista Geral, Rio Cotinga, elev. 720 m, Maguin 

 $ Maguire 40199, 40263. 



Calliandra tsugoides Cowan, sp. nov. 



Arbuscula 6-10 m alta, ramulis leviter albo-pilosis ; stipulae deciduae. ca. 5 

 mm longae. 1 mm latae, lineari-lanceolatae, obtusae. externe strigulosae. intus 

 glabrae; petioli 5-6 mm longi, parce pilosuli, rachibus 12-30 mm longis. sparse 

 pilosulis ; pinnae 2-4-jugatae, anguste ellipticae, petiolis seeondariis 2 mm longis. 

 sparse pilosulis, rachibus seeondariis 60-80 mm longis. sparse pilosulis; foliola 

 sessilia, 35-45-jugata, valde approximata. angustissime oblonga, leviter curvata. 

 apice rotundato-obtusa. base truncata, supre valde nitida, infra glabra, ciliolata. 

 costa nulla, 3-nervia, utrinque nerviis prominnlis, pinnarum foliolis mediis 7-12 

 mm longis, 1.5-2 mm latis, foliolis apicalibus et basalibus plus minoribus; iuflo- 

 rescentia capitata, terminaJis et in axillis foliorum superiorum, pedunculo 17-27 

 mm longo. albo-pilosulo et glanduloso-puberulo, floribus sessilibus, perianthio 

 externe sericeo, intus glabro ; calyx cupularis, ca. 2 mm longus, 4-dentatus ; 



