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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [Vol. 9, No. 3 



TYPE: infrequent, pocket thickets, Summit Peak IV, January 3, 1949, Cerro 

 Sipapo, Terr. Amazonas, Venezuela, Bassett Maguire & Louis Politi 28144; U.S. 

 National Herbarium No. 2,040,180. 



5- Myriocladus neblinaensis Swallen, sp. nov. Figure 1. 



Culmi usque ad 1.5 m alti, rhizomatosi, simplices vel nodiis superioribus 

 ramosi; vaginae dense pubescentes, minute ciliatae, summo ligula exteriore 0.2 

 mm longa minute ciliata; ramorum primorum laminae 4-6 cm longae, 12-20 mm 

 latae, breve petiolatae, appressae vel adscendentes, acutae, glabrae vel obscure 

 pubescentes, marginibus scabrissimae; ramorum primorum paniculae 6-8 cm 

 longae, 1-2 cm latae, densae, ramis brevibus appressis vel adscendentibus; 

 spiculae 3-4 -florae, suprema reducta; rachilla pubescens; glumae acuminatae, 

 sparse pubescentes, marginibus ad summum minute ciliatae, prima 5*7 mm longa, 

 secunda 7-9 mm longa; lemma sterile 8-10 mm longum, acuminatum vel aristatum, 

 pubescens; lemma fertile 9-10 mm longum, acutum vel aristatum, pubescens vel 

 ad basin glabrum, marginibus ciliatum; palea quam lemmate brevior, multo angus- 

 tior, inter carinam pubescens, carinis hispida, summo truncata, hispida, nerviis 

 excurrentibus. 



Culms as much as 1.5 m tall from a rhizomatous base, simple or with few to 

 several branches from the upper nodes, the branches sometimes branching and 

 rebranching, successively with smaller blades and inflorescences, naked below 

 the terminal crowded sheaths or with small series of shortened internodes alter- 

 nate with long internodes, sometimes with a single branch from each series; 

 branches densely pubescent; exposed portion of sheaths 1-1.5 cm long, densely 

 crisp pubescent, the rim at the summit about 0.2 mm long, very minutely ciliate; 

 blades of the primary branches 4-6 cm long, 12-20 mm wide, acute, abruptly 

 rounded at the base to a short thick petiole, appressed or ascending, glabrous or 

 obscurely pubescent, the margins very scabrous; panicles of the primary branches 



6- 8 cm long, usually long-exserted, 1-2 cm wide, dense, the short branches ap- 

 pressed or ascending, those of the secondary branches smaller, short -exserted 

 or partly enclosed in the sheath; spikelets 3~4-flowered, the upper floret rudi- 

 mentary, the fertile florets readily disarticulating, the rachilla pubescent; glumes 

 acuminate, the first 5-7 mm long, rarely shorter, the second 7-9 mm long, sparsely 

 pubescent, the margins minutely ciliate toward the summit; sterile lemma 8-10 

 mm long, acuminate or with an awn as much as 1 mm long, pubescent like the 

 glumes; first fertile lemma 9-10 mm long, acute, sometimes with an awn as much 

 as 1 mm long, sparsely pubescent, or glabrous toward the base, the margins 

 ciliate in the upper half; palea shorter than the lemma (about 1 mm), much nar- 

 rower*than the lemma, flat or only slightly concave, pubescent between the keels, 

 especially toward the summit, the keels hispid, the tip truncate, hispid, the 

 nerves usually excurrent. 



TYPE: occasional along escarpment overlooking Cano Grande, below Cumbre 

 Camp, alt. 1650 m, Cerro de la Neblina, Rfo Yatua, Terr. Amazonas, Venezuela, 

 January 10, 1954, Bassett Maguire, John J. Wurdack, & George S. Bunting 37208; 

 U.S. National Herbarium Nos. 2,182,104, 2,182,105. Other specimens from Cerro 

 de la Neblina: frequent in west escarpment savanna, 4-8 km. southwest of Cumbre 

 Camp, alt. 1850-1900 m, Bassett Maguire, John J. Wurdack, & George S. Bunting 



Explanation of figures 1, 2 



FIG. 1. Myriocladus neblinaensis Swallen. a, branch, x / 2 \ b, spikelet, x 5; c, d, base 

 and tip of blade, X 5- FIG. 2. Myriocladus simplex Swallen. a, plant, X Y 2 ; b, panicle, 

 X Vit c, spikelet, X 5. (Drawings by LaVerne Helen Richardson.) 



