6 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Leeward Islands : St. Kitts, Britton d- Cowell 632. 



Windward Islands : Grenada, Broadway 177. 



Trinidad: Port of Spain, Hitchcock 10041. Caparo Woods, Broadway 4931. 



Explanation of Plate 3. — Ichnanthus nemorosus. Specimen from River Estate, Povt 

 of Spain, Trinidad, Hitchcock 10041 (U. S. Nat. Herb. no. 975139). Natural size. 



4. Ichnanthus pallens (Swartz) Munro. 



. Panicum pallens Swartz, Prodr. Veg. Ind. Occ. 23. 1788. " Jamaica." The 

 type has been examined in the Swartz Herbarium at Stockholm. 



Panicum hemignostum Steud. Syn. PI. Glum. 1 : 77. 1854. " Paraguay." The 

 type has been examined at the Paris Herbarium. 



Ichnanthus pallens Munro; Benth. Fl. Hongk. 414. 1861. Based on Panicum 

 pallens Swartz. 



DESCRIPTION. 



Culms much branched, spreading, creeping at the base, rooting at the nodes, 

 the fertile culms ascending 30 to 80 cm. or sometimes more, puberulent ; sheaths 

 usually glabrous on the surface, villous on the margin ; blades lanceolate, often 

 somewhat falcate, 5 to 10 cm. long, mostly 1 to 2 cm. wide, somewhat clasp- 

 ing at the asymmetric narrowed base, somewhat abruptly narrowed to an 

 acuminate point, the lower surface glabrous or slightly scaberulous, roughened 

 with irregular crossveins, sometimes with a few scattered stiff hairs, the upper 

 surface scaberulous, often with a few stiff hairs at the base and on the basal 

 portion of the margin ; panicles terminal and from several of the upper axils, 

 5 to 10 cm. long, rather compact, elliptic, the main branches ascending, as much 

 as 6 cm. long, usually bearing secondary branches, the axes angled and scab- 

 rous, pubescent at the base of the branches ; spikelets 3 to 3.5 mm. long, glab- 

 rous or rarely with a few stiff hairs ; first glume 1.5 to 2 mm. long, somewhat 

 clasping at base, attenuate-pointed, scabrous on the keel ; second glume longer 

 than the sterile lemma, acuminate but scarcely attenuate-pointed, scabrous on 

 the keel and roughened on the lateral nerves; sterile lemma similar to the 

 second glume, but shorter and less narrowed at the summit, the palea well 

 developed, nearly as long as the lemma ; fertile lemma oblong, 1.5 mm. long, 

 rounded at apex, the margins inrolled, distant, the scars at base 0.3 mm. long, 

 narrowly winged at the side. 



DISTRIBUTION. 



Shady banks and rich woods, tropics of the Western Hemisphere, from 



southern Mexico and Cuba southward ; introduced in southeastern Asia. 



Veracruz : Cordoba, Hitchcock 6454. Jalapa, Hitchcock 6675. Mirador, Lieb- 

 mann 400, 401, 740 (abnormal). 



Campeche: Atasta, Rovirosa 642 (abnormal i. 



Guatemala: Cubilquitz, Tiirckheim 4038. Sepacuite, Collins &■ Go/? 011 (abnor- 

 mal). Senahu, Goll 178 (abnormal). Livingston, Tiirckheim 8792. 



Honduras : San Pedro Sula, Thieme 17, 5590, 5594. Puerto Sierra, Wilson 614. 



Costa Rica : San Jose, Cooper 5991. Buenos Aires, Pittier 10591. Canas 

 Gordas, Pittier 7361. Boca de Zhorquin, Tonduz 8636. San Marcos, 

 Tonduz 7564. Rodeo de Pacaca, Pittier 3269. Luis, Tonduz 11393. Ter- 

 raba, Tonduz 3616. Boruca, Tonduz 3633. 



Panama: Matias Hernandez, Pittier 6923. Bocas del Toro, Hart 69, 72, 89. 

 Culebra. Hitchcock 8023, 9164. Ba.^ Obispo. Hitchcock 9210. Gatun, 

 Maxon 4654; Hitchcock 9181. Alhajuela, Pittier 2335. Corozal, Hitch- 

 cock 9201. El Boquete, Hitchcock 8273, 8302, 8306. San Felix, Pittier 

 5204 (abnormal), 5230, 5272. 



