282 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 



Grassy hills and rocky cliffs, southern United States to Argentina. Orig- 

 inally described from Brazil. 

 Cuba (Province of Pinar del Rio) and Jamaica (in the Blue Mountains). 



14. Andropo^on semiberbis (Nees) Kunth, Enum. PI. 1: 496. 1833. 

 Schizachyr'mni semiherhe Nees, Agrost. Bras. 336. 1829. 



Similar to no. 12, stouter, taller, often glaucous; blades up to 5 mm. wide; 

 racemes numerous toward the summit of the culm. 



Grassy hills and savannas, Florida, through the West Indies to Brazil. 

 Originally described from Brazil. 



Bahamas (New Providence), Cuba, Haiti, Santo Domingo, Porto Rico, and 

 Trinidad (St. Joseph, Hitchcock 10194). 



15. Andropogon piptatherus Hacli. in Mart. Fl. Bras. 2": 293. 1883. 

 Amphilophis piptatherus Nash, N. Anier. Fl. 17: 127. 1912. 



A weak-stemmed branching annual with flat scabrous blades and loose fasci- 

 cles of racemes with twisted bent awns about 3 cm. long. 



Moist rocky cliffs and shady banks, Mexico to Brazil ; also in Jamaica a*nd 

 Santo Domingo. Originally described from Brazil. 



16. Andropog-on pertusus (L.) Willd. Sp. PI. 4: 922. 1806. Seymour grass. 

 Holcus pertusus L. Mant. PI. 2: 301. 1771. 



An ascending branching tufted perennial with bearded nodes, pubescent 

 blades, and somewhat fan-shaped panicles of several to many villous racemes 

 with twisted bent awns about 2.5 cm. long. 



Roadsides and open grassy places, tropics of the Old World ; introduced in 

 the West Indies. Originally described from India. This species is described 

 by Nash^ as Amphilophis ischaeinum (L. ) Nash {Andropoyon ischaemum L.), 

 an Old World species with glumes not pitted. It may be that A. pertusus is 

 only a form of A. ischaemum with pitted glumes. 



Jamaica, Antigua, Guadeloupe, Dominica, Martinique, Grenada, and Bar- 

 bados. 



16a. Andropogon pertusus var. panormitanus (Pari.) Hack, in DC. Monogr. 

 Phan. 6: 481. 1889. 



Andropogon panormitanus Pari. " in Diar. Congr. Venezia 1847 " ; Fl. Ital. 

 1: 140. 1848. 



Differs from the species in having glabrous nodes and nearly glabrous blades. 



Roadsides and open grassy places, warmer parts of the Old World. Intro- 

 duced in the West Indies. Called " sour-grass " in Tobago. Originally de- 

 scribed from Sicily. This appears to be what was described by Richard * as 

 Andropogon ischaemum. 



St. Croix, Antigua, St. Vincent, Barbados, Trinidad, and Tobago. 



17. Andropogon annulatus Forsk. Fl. Aegypt. Arab. 173. 1775. 

 Resembling A. pertusus but differing in the absence of the pit on the back 



of the glumes and in the more imbricate spikelets ; nodes bearded. 



A native of the Old World, originally described from Egypt. Introduced in 

 Cuba. 



18. Andropog'on saccharoides Swartz, Prodr. Veg. Ind. Occ. 26. 1788. 

 Andropogon saccharoides subsp. leucopogon subvar. paucirameus Hack, in DC. 



Monogr. Phan. 6: 497. 1889. 

 Sorghum saccharoides Kuntze, Rev. Gen. PI. 2: 792. 1891. 



*N. Amer. Fl. 17: 124. 1912. 'In Sagra, Hist. Cuba 11: 320. 1850. 



