402 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
VirGINn Isuanps: St. Croix, Rose 3523, 3533; Thompson 9; Baker in 
1929; Ricksecker 209; Hitchcock 16330. St. Thomas, Hitchcock 16317. 
LrErwarp Isuanps: Antigua, Box 3,181. Nevis, Bor 173. Dom- 
inica, Bot. Gard. 1. 
Winpdwarp Isutanps: Barbados, Hitchcock 16518. Grenada, Hitch- 
cock 17683. 
Trinipap: Bot. Gard. Herb. 5064. 
Tosaco: Hggers 5654; Broadway 4727; Hitchcock 10220, 10234. 
31. Andropogon ischaemum L., Sp. Pl. 1047. 1753. Europe. 
Andropogon ischaemum var. americanus Hack., in DC., Monogr. 
Phan. 6: 476. 1889. Venezuela and Antigua. 
Sorghum ischaemum Kuntze, Rev. Gen. Pl. 2: 792. 1891. 
Amphilophis ischaemum Nash, N. Amer. Fl. 17: 124. 1912. 
Differing from A. pertusus in the absence of a pit on the back of the 
first glume of the sessile spikelet. 
Introduced; open ground, Leeward Islands; Tropics of the Old 
World. 
LEEWARD Istanps: Antigua, Wullschlaegel. 
107. DIECTOMIS H.B.K. Nov. Gen. et Sp. 1: 193. pl. 64. 18165 
Spikelets arranged as in Andropogon; raceme solitary, subtended by 
a spathe; first glume of pediceled spikelet large, flat, herbaceous, many- 
nerved, awned from between 2 slender teeth; first glume of fertile 
(sessile) spikelet narrow, 2-keeled; second glume laterally compressed, 
the midnerve wing-keeled, awned; fertile lemma with a bent awn more 
than twice as long as those of the glumes. Erect annual with flat 
blades. 
1. Diectomis fastigiata (Swartz) H. B. K., Nov. Gen. et Sp. 1: 198. 
pl. 64. 1816. 
Andropogon fastigiatus Swartz, Prodr. Veg. Ind. Occ. 26. 1788. 
Jamaica. 
Slender, glabrous; culms 0.5 to 1.5 m tall, freely branching above; 
ligules firm, up to 2 cm long; blades 1 to 4 mm wide; racemes 2 to 6cm 
long; joint of rachis and sterile pedicel winged at the summit, long- 
villous, the white hairs as much as 7 mm long; the conspicuous pedi- 
celed spikelet 8 mm long; awn of fertile lemma geniculate, 4 to 5 cm 
long (fig. 357). 
Dry open ground, southern Mexico and the West Indies to Brazil. 
Cusa: Asiento Viejo de San Julian, Léon 6911; Wright 3485. San 
. Cristétal, Wright 3483. Guane, Shafer 10384, 10413, 11218. San 
Juan y Martinez, Ekman 18074. Guanabacoa, Hitchcock 23230; Léon 
3451, 4719; Wilson and Léon 2876. 
Jamaica: Bellevue, Harris 11288. Content Gap, Harris 11344. 
Temple Hall, Harris 11358. Flamstead, Harris 11464. Mavis Bank, 
Harris 11507. Barican, Mitchcock 9572. Lititz, Harris: 12700: 
Southern Manchester, Harris 12692. 
Harti: St. Michel de l’Atalaye, Leonard 7154, 7290, 7525. Marme- 
lade, Leonard 8201. Ennery, Leonard 8801, 9068. Plaisance, Leon- 
ard 9414. Montagne du Trou d’Eau, Ekman H 2317. Pétionville, 
Ekman 2331. Petite Riviére, Sweet in 1924. Morne Castilleur, 
Ekman H. 6420. 
5 For discussion of the nomenclature, see Contrib. U. S. Natl. Herb. 24: 206, 1925; 692, 1930. 
