1958] 



THE BOTANY OF THE GUAYAXA HIGHLAND PART III 



71 



lateralibus non impressis; petiolis 8-12 mm longis; paniculis 9-12 cm longis 

 multifloris, bracteis deciduis; floribus sessilibus, alabastris clausis 2.5 mm longis, 

 calyptratis. 



Tree 15 m high, the inflorescence conspicuously (but densely on the base of 

 the hypanthium only) pubescent with appressed reddish mostly dibrachiate hairs 

 to 0.5 mm long; leaves elliptic, 2-) 3.5-4.5 cm wide, 8-10 cm long, 2.5- times 

 as long as wide, slenderly acuminate, acute at the base, the margins decur- 

 rent on the channeled petiole 2 mm thick, 8-12 mm long; midvein flat above or 

 obscurely sulcate near base, prominent beneath ; lateral veins about 15 -20 pairs 

 with numerous intermediates, inconspicuous on both sides ; marginal vein about 

 equaling the laterals, 1-1.5 mm from the margin; leaves above green and 

 impressed-puncticulate, the lower surface paler and minutely dark-dotted; in- 

 florescence of paired panicles 9-12 cm long, many-flowered, about 3 times com- 

 pound, the branches sub-opposite or irregularly alternate, the nodes often en- 

 larged, the peduncle 1-1.5 cm long, 2.5-3 mm wide below the lowest node ; flowers 

 closely sessile along the raceme-like panicle branches, and the base often appear- 

 ing to be immersed (whence the name "apoda") ; calyx reddish (Smith) ; buds 

 2.5 mm long, obovoid, short-apiculate ; calyptra conic or domelike, nearly half 

 the length of the bud ; hypanthium in anthesis campanulate, prolonged 0.5 mm 

 above the summit of the ovary, the distal margin soon widely flaring and re- 

 curved and the whole explanate, surrounded by the disk 1.5-2 mm wide; style 

 reddish (Smith), 4.5 mm long, very soon deciduous; stamens about 35, 3 mm 

 long or more ; anthers 0.4 mm long ; petals none ; ovary bilocular, with 2 ascend- 

 ing ovules in each locule. 



BRITISH GUIANA: Basin of Essequibo River, near mouth of Onoro Creek, lat. about 

 1°35' N., dense forest on high land, Dec 15-24, 1937, A. C. Smith 2723 (NY, type; US). 



3. Calyptranthes canaliculata McVaugh, sp. nov. 



Arbor vel frutex, usque ad 12 m altus, ramulis paniculis alabastrisque pilis 

 lucidis rufis, magna pro parte dibrachiatis, 0.6-1.2 mm longis, dense obsitis; 

 ramulis exalatis; foliis acuminatis 14-21 cm longis, supra vix punctatis; nervo 

 medio supra impresso ; venis lateralibus non impressis ; petiolis 7-10 mm longis ; 

 paniculis 10-17 cm longis multifloris; bracteis deciduis ; alabastris clausis 2 mm 

 longis calyptratis. 



Tree or shrub to 12 m high, the inflorescence and young growth heavily 

 pubescent with appressed or spreading lustrous reddish-brown hairs 0.6-1.2 mm 

 long, the hairs mostly dibrachiate and attached very near one end ; leaves elliptic- 

 ovate, 5.5-8 cm wide, 14-21 cm long, 2.2-2.7 times as long as wide, acuminate, 

 rounded to the base and finally acute, the margins decurrent on the inner angles 

 of the stout, rough, channeled petiole 2-3 mm thick, 7-10 mm long; midvein 

 impressed above as a broad U-shaped or V-shaped channel 1 mm wide at the 

 base and half as deep ; lateral veins about 15-20 pairs in addition to some 

 weaker intermediates, inconspicuous above, more prominent beneath; marginal 

 vein about equaling the laterals and arched between them, 3-8 mm from the 

 margin, with a weaker submarginal vein beyond it ; leaves smooth above or some- 

 times obscurely dotted, the lower surface paler and abundantly and finely dark- 

 dotted; inflorescence of paired panicles from an abortive compressed axis up to 

 3 mm long and wide, the individual panicles 10-17 cm long, 3 times compound, 

 many-flowered, the flowers mostly clustered in 3's near the tips; peduncle 4-7 

 cm long, somewhat compressed, 1.5 mm wide at the summit ; bracts and bracteoles 



