1957] 



THE BOTANY OF THE GUAYANA HIGHLAND — PART II 



243 



lemma fertile primum 5 mm longum, lemma sterile simulans; palea quam lemmate 

 paulo longior, inter carinam pubescens, summo hispidula. 



Culms as much as 4 m tall, branching and rebranching, with or without long 

 internodes between the branches, these single or in pairs, erect or nearly so, 

 elongate, relatively slender; crowded sheaths extending upward on each branch 

 for as much as 15 cm, the exposed portion of each sheath 1-1.5 cm long; sheaths 

 glabrous or appressed pubescent, with a short, minutely ciliate rim at the summit, 

 fimbriate in the throat; blades 10-11.5 cm long, 2 cm wide, or the upper ones 

 smaller, acute, broadly rounded or subtruncate at the base, the margins hispidu- 

 lous-ciliate toward the base, scabrous upward; inflorescence 17-33 cm long, with 

 relatively few long ascending branches, the lower ones 7-13 cm long, the axis, 

 branches, and pedicels glabrous; spikelets 2- or 3-f lowered, distant, the pedicels 

 about 4 mm long; first glume linear-lanceolate, 2.5~3«5 nun long, the margins 

 minutely ciliate nearly to the base, the tip rounded, hispidulous; second glume 



4 mm long, similar to the first but broader; sterile lemma 5 mm long, actue, blunt, 

 the midnerve thickened at the tip, the margins minutely ciliate; first fertile lemma 



5 mm long, similar to the sterile lemma; palea slightly longer thnn the lemma, 

 pubescent between the nerves, the tip hispidulous. 



TYPE: occasional, Summit Camp to Southwest Escarpment, alt. 1850 m, 

 Cerro Huachamacari, Rio Cunucunuma, Terr. Amazonas, Venezuela, December 17, 

 1950, Bassett Maguire, R. S. Cowan, & John J. Wurdack 30295; U.S. National 

 Herbarium No. 2,040,226. 



8. Myriocladus cardonae Swallen, Fieldiana 28(1): 35. 1950. Figure 3d. 



VENEZUELA: Cumbre del Cerro Acopan, (Chimanta-tepuf), Bolfvar, Felix 

 Cardona 2307. 



9. Myriocladus longiramosus Swallen, sp. nov. Figure 3e. 



Culmi 3-5 m alti, summo ramis 4 usque ad 2 m longis; ramorum vaginae in- 

 feriores (pars manifestus) 2.5 cm longae, superiores longiores, suprema elongata; 

 laminae 11-16 cm longae, 2.5-5.0 cm latae.,basi subtruncatae, glabrae, margini- 

 bus scabrae; paniculae 40-55 cm longae, multiramosae, ramis adscendentibus, 

 inferioribus 9-14 cm longis, subremotis, ad summum brevioribus et densioribus; 

 spiculae 3"florae, suprema reducta secreta, pedicellis 2-3 mm longis appressis; 

 rachilla scabra, inter flosculos 0.4-0.5 mm longa; gluma prima angusta, 2-2.7 mm 

 longa; gluma secunda latior 2.8-3.5 mm longa; lemma sterile 3 mm longum, obtu- 

 sum, glabrum; lemma fertile primum 4.4 mm longum, obtusum, glabrum; palea 

 obtusa, lemma superans, concava, glabra, vel apice pubescens. 



Culms 3"5 m tall; branches four together, the longest nearly 2 m long with a 

 group of shortened internodes in the middle; exposed portion of sheaths at the 

 base of the branches about 2.5 cm long, the upper ones longer, or the uppermost 

 elongate; blades 11-16 cm long, 2.5-5.0 cm wide near the rounded subtruncate 

 base, much narrower than the mouth of the sheath, the margins scabrous, other- 

 wise glabrous; inflorescence 40-55 cm long, with numerous rather stiffly ascend- 

 ing branches, the lower ones 9-14 cm long, somewhat distant, becoming shorter 

 and more crowded upward; spikelets 3-flowered, the upper rudimentary, usually 

 hidden between the fertile florets, the pedicels 2-3 mm long, appressed; rachilla- 

 segment below first fertile floret thick, 0.4 mm long, sparsely scabrous, the 

 segment below the second floret 0.5 mm long, slender, scabrous; first glume nar- 

 row, 2-2.7 mm long, the tip blunt; second glume 2.8-3.5 mm long, somewhat 

 broader than the first; sterile lemma 3 mm long, obtuse, glabrous, the midnerve 

 thickened at the tip, sometimes slightly excurrent; lemma of first fertile floret 

 4.4 mm long, obtuse, glabrous, the midnerve thickened at the tip; palea obtuse, 



