400 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



12. Arthrostylidium ang-ustifolium Nash, Torreya 3: 172. 1903. 



Culms 2 to 3 meters long, freely branching, clambering over shrubs; ultimate 

 branches leafy, with short overlapping compressed sheaths and erect blades 

 3 to 4 mm. wide and as much as 25 cm. long, the branches terminating in strict 

 panicles, the slender branchlets erect, the linear spikelets 2 to 3 cm. long. 



Wooded mountain slope, El Yunque, Baracoa, Cuba. Known only from the 

 type collection, Underwood & Earle 941. 



13. Arthrostylidium obtusatum Pilger in Urban, Symb. Antill. 2: 340. 1901. 

 Arundinaria obtusata Hack. Oesterr. Bot. Zeitschr. 53: 69. 1903. 

 Inflorescence racemose, terminating fascicled leafy branches and borne in 



the axils ; blades rather rigid, about 8 cm. long and 12 mm. wide, tapering from 

 base to apex, the tip obtuse. 



Known only from the original collections from the summit of Morne d' Amour, 

 Martinique (Duss 563, 1310). 



108. CHUSQUEA Kunth. 



Spikelets small, with 1 perfect floret and 2 empty lemmas below it, the rachilla 

 articulate below the glumes, the spikelets in small terminal panicles ; blades 

 disarticulating from the persistent sheaths. 



1. Chusquea abietifolia Griseb. Fl. Brit. W. Ind. 529. 1864. 



Arundinaria? microclada Pilger in Urban, Symb. Antill. 5: 289. 1907. 



Crawling and climbing to a height of 7 meters or more, the slender culms 

 festooning and forming an entanglement across mountain trails; branchlets 

 about 10 cm. long, in whorls, the numerous rigid, spine-tipped, scabrous-margined 

 blades 2 to 3 cm. long, drying glaucous ; flowering branches leafy at base, 

 terminating in a small few-flowered, nearly simple panicle, the spikelets short- 

 pediceled; very rarely flowering. 



Wet woods, Blue Mountains, Jamaica, Porto Rico (Monte Alegrillo), and 

 Haiti (Monte Furcy). Originally described from Jamaica, common in the Blue 

 Mountains above 1,000 meters. The specimens from Cold Spring Gap collected 

 by Harris (Amer. Gr. Nat. Herb. 400 1 ) and by Hitchcock (no. 9734) are fertile; 

 the others are sterile. Arundinaria microclada was described from sterile 

 specimens collected at 1,500 meters altitude, in open woods on Monte Furcy, 

 Haiti {Picarda 270, Buch 930). The Picarda specimen in the Krug & .Urban 

 Herbarium is about a meter long, apparently the pendent end qf a culm, the 

 short branchlets and small blades (12 to 15 mm. long) suggesting a dry 

 situation. The sheaths are minutely pubescent as in the Porto Rico specimens ; 

 in Jamaica specimens the sheaths are pubescent on the margin only. 



109. PLANOTIA Munro. 



Spikelets as in Chusquea, crowded in a long dense panicle ; culm herbaceous. 



1. Planotia virgata (Griseb.) Munro, Trans. Linn. Soc. 26: 71. 1868. 



Platonia virgata Griseb. Fl. Brit. W. Ind. 530. 1864. 



Culms herbaceous, tall, robust, leafy below, the thickish blades commonly 

 more than 1 meter long, about 5 cm. wide, long-attenuate, the margins serrulate ; 

 panicle much exceeding the leaves, about 75 cm. long and 2 cm. thick, compact, 

 tawny, the small spikelets densely crowded. 



Dense forests, mountains of Trinidad, the type collected at Tocuche by 

 Crueger. 



1 See footnote, p. 405. 



