290 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
1. Arundinella confinis (Schult.). 
Piptatherum confine Schult. Mant. 2: 184. 1824. 
Arundinella martinicensis Trin, Gram, Pan. 62. 1826, 
Agrostis berteriana Spreng.; Steud. Nom. Bot. ed. 2. 1: 89, 148. 1840. 
A tufted erect perennial with strong slender simple culms up to 2.5 meters 
tall, flat blades, scabrous at least on the upper surface, and rather densely 
flowered oblong panicles 20 to 40 cm. long. 
Grassy slopes, West Indies and southern Mexico to Paraguay. Described from 
Martinique, Sieber 265 being the type of Piptatherum confine and Sieber 262 
being the type of Arundinella martinicensis. The Cuban name is “ cafiuela de 
sabana.” 
Cuba, Jamaica, Haiti, Santo Domingo, Porto Rico, Guadeloupe, Dominica, 
Martinique, St. Vincent, Trinidad, and Tobago. 
2. Arundinella deppeana Nees in Steud. Syn. Pl. Glum. 1: 115, 1854. 
Similar to the preceding, the panicle branches on the average longer and 
laxer, the awns longer. 
Moist places, Mexico to Brazil; also in central and western Cuba. Originally 
described from Mexico. 
3. Arundinella berteroniana (Schult.). 
Trichochloa berteroniana Schult. Mant. 2: 209. 1824. 
Thysanachne peruviana Presl, Rel. Haenk. 1: 253. 1830. 
Muhlenbdergia berteroniana Kunth, Enum. Pl. 1: 202. 1833. 
Podosaemum virens Balb.; Kunth, loc. cit. as synonym of Muhlenbergia ber- 
teroniana. 
Arundinella peruviana Steud. Syn. Pl. Glum. 1: 115. 1854. 
Arundinella cubensis Griseb. Mem, Amer, Acad. n. ser. 8: 533. 1862. 
Smaller, more slender than nos. 1 and 2, with narrower, folded or involute 
blades and more open fewer flowered panicles with slightly larger spikelets. 
Moist places, Mexico to Brazil; also Hispaniola and central and eastern 
Cuba. Originally described from Santo Domingo. Thysanachne peruviana was 
described from Peru. The type specimen of Arundinella cubensis is Wright 
1552. 
24. TRISCENIA Griseb. 
Spikelets short-pedicellate, narrow, awnless, the fruit inclosed in the in- 
folding second glume and sterile lemma. 
1. Triscenia ovina Griseb. Mem. Amer. Acad. n. ser, 8: 534. 1862. 
A tufted perennial with filiform culms and blades, compressed, subindurate 
sheaths crowded at the base, and attenuate few-flowered panicles. 
Only known from two collections from eastern Cuba, the type, Wright 756, 
and Shafer 3668 from Piedra Gorda to Rio Seboruco. 
25. ACHLAENA Griseb. 
Spikelets with the rachilla produced into a pointed callus; first glume re- 
duced to a long slender awn, the second glume awned from the summit; sterile 
lemma awnless, infolding the membranaceous fertile lemma and palea, 
From Grisebach’s description of the genus it is evident that he failed to note 
the palea, mistaking the sterile lemma for the fertile lemma (flos fertilis) and 
the fertile lemma for the palea, stating as he does that the palea is 1-nerved. 
Bentham & Hooker* and Hackel’ follow Grisebach in this disposition of the 
*Gen. Pl. 3: 1117. 1883. 
"In Engl, & Prantl, Pflanzenfam. 27: 41, 1887. 
