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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 10 



6. Platycarpum decipiens Woodson & Steyermark, Am. Jour. Bot. 39 : 422. 1952. 



Fig. 76, D-H. 



At the time of publication of the original description of this species, no calyx 

 or corolla was available for study. The excellent flowering material, recently 

 collected by Wurdack & Aclderley 43226, furnishes the following emended de- 

 scription to be added to the original publication. 



Petioles 1-2 cm long; gland at base of petiole semi-lunar, 1-1.25 mm long; 

 leaf-blades 2.5-4.7 cm wide ; lateral pairs of nerves 11-16 ; inflorescence 9-17 cm 

 long, slightly longer than broad to 1% times as broad as long or as broad or 

 broader than long, upper secondary lateral branches of the peduncle 2.5-3 cm 

 long, lower ones 4.5-6 cm long, 15-42-flowered, lateral secondary branches (ex- 

 cept the lowest) and ultimate pedicels cinereous-strigillose with sparse to mod- 

 erate ascending-spreading rufous hirtellous pubescence ; lower half of main 

 central peduncle glabrous and glaucous, as are sometimes also the lowest lateral 

 secondary branches; calyx-lobes 5, subequal, sericeous within, tomentosc without 

 with strigose hairs; corolla somewhat zygomorphic, white, inside crimson-streaked 

 with one yellow lobe (teste Wurdack & Adderley) , -the one yellow lobe densely 

 tomentose within, the other four lobes glabrous within, densely barbate zone at 

 base of swollen and enlarged filaments ; corolla 21-23 mm long, tube 4 mm long, 

 glabrous within at very base, enlarged abruptly above the tube to a spreading 

 limb 6-12 mm long, 15-17 mm broad at orifice, densely buff -strigose or sericeous 

 without; corolla-lobes slightly less than one-half to slightly more than one-half 

 length of corolla, one of them tomentose within cut usually more deeply along 

 one side (up to 16 mm long) while 12-13 mm long on other side, the other four 

 lobes more or less similar and cut to 9-13 mm long, the lobes mainly 5-6 mm 

 wide, subacute or subobtuse; stamens 5, somewhat unequal, three generally 

 slightly higher than the other two ; filaments curved, glabrous, swollen or 

 enlarged at very base, 6.5-8 mm long; anthers versatile, glabrous, 4 mm long 

 with prominent obtuse appendage protruding at apex; shortest two stamens 

 present generally on either side of the lobe which is densely tomentose within. 



Additional specimens examined: VENEZUELA. Amazonas: Williams 14587 

 (isotype VEN) ; Cano San Miguel just above Limoncito 15 km from Rio Guainia; 

 corolla white, inside crimson streaked with one yellow lobe; 28 Jun 1959, 

 Wurdack & Adderley 43226 (NY). 



At the time of the original description, this species was thought to have the 

 largest fruits in the genus. Its measurements are now exceeded by those of 

 other species. 



7. Platycarpum negrense Ducke, Arquiv. Inst. Biol. Yeg. Rio de Janeiro 1: 



212. 1935. 



8. Platycarpum rhododactylum Woodson & Steyermark, Am. Jour. Bot. 39: 



423. 1952. 



Examination of additional material makes it necessary to emend the original 

 description as follows : 



Leaf -blades 3-12 cm wide, broadly ovate to ovate-elliptic or oblong-elliptic; 

 petiolar gland at very base of petiole on lower side, slightly narrowed at each 

 end but mostly oblong, 2-4 mm long, 1.2-2 mm high ; inflorescence condensed, 

 5-7 cm long, 4.5-6 cm broad, peduncle suppressed or the first elongated node 



