330 
(15) ISCHAEMUM J.inn. 
liacemes two to many, digitate. S])ikelets broad, the pedicellate like 
the sessile bnt frecjnently nnawned, rarely staminate or empty. First 
empty ginme coriaceous or memlrranons, olhuse, often 2-toothed. Flow- 
ering glume awned from the apex or from the notch. Mostly low 
grasses nith rather broad leaves. 
Species abmit 40, tropics of both heiiiisplieres, 7 in tlie Pbilipjiines. 
1. Articulations and pedicels 3-angled ; inflorescence 
glabrous or slightly dilate or pilose, the hairs white. 
2. First glume of the sessile spikelet transversely 
rugose. 
3. First glume nearly flat, with 2 to 4 mar- 
ginal nodules or low transverse ridges ; 
perennial : (1) I. arisiatum 
3. First glume strongly convex, closely trans- 
versely ridged ; annual (2) I. rugosuni 
2, First glume of the sessile spikelet not trans- 
versely rugose. 
3. Spikes two. 
4. Fourth glume of the sessile spikelet 
unawned ; a maritime grass (3) I. muticum 
4. Fourth glume of the sessile spikelet 
awned. 
5. Culms erect (4) 7. merrilUi 
5. Culms much elongated, pros- 
trate (5) 7. arundinaccHin radicans 
3. Spikes five to six (6) 7. intermedium 
1. Articulations and pedicels 2-angled ; inflorescence densely 
ferruginous-villous (7) 7. angustifoJium 
(1) Ischaemum aristatum Linn. Sp. FI. (1853) 1049, var. gibbum (Trin.) 
Flack, in DC. Monog. Plian. 6 (1889) 204; Pilger in Perk. Frag. FI. Philip. 
(1904) 139. IschaemiCm, gibhum Trin. in Mem. Acad. St. Petersb. VI. 2 (1833) 
295; Miq. FI. Ind. Bat. 3 (1859) 498; F.-Vill. Nov. App. (1883) 315. Andro- 
pogon gibhum Steud. Syn. 1 (1855) 376. 
Luzon, Province of Isabela, Ecliague (135 Merrill) June, 1902; Province of 
Nueva Viscaya, Dujtax (253 Merrill) May, 1902: Manila (69 McGregor) October, 
1904; {Scribner) .June, 1902; (Merrill) .January, 1906. Culion (469, 677 
Merrill) December, February, 1902-03. 
Endemic, i. e., the variety, the species India, China, and Malaya. 
(2) Ischaemum rugosum Salisb. Ic. (1791) 1. t. 1. var. distachum (Cav.) 
7. rugosum var. scgeium (Trin.) Flack, in DC. Monog. Phan. 6 (1889) 208; 
Pilger in Perk. Frag. Fl. Philip. (1904) 139. Colladoa distachga Cav. Icon. 5 
(1799) 37. t. JiGlh Ischaemum colladoa R. Br. Prodr. (1810) 205; Kunth. 
Enuin. 1 (1833) 513; Miq. Fl. Ind. Bat. 3 (1859) 498. Ischaemum segeium 
Trin. in Mem. Acad. St. Petersb. VI. 2 (1833) 294. Audropogon segclum Steud. 
Synopsis 1 (1855) 376. Audropogon ramosus Blanco, Fl. Filip, ed. 1 (1837) 
37; ed. 2 (1845) 25, ed. 3, 1 (1877) 47, non Forsk. 7. ciliare F.-Vill. Nov. App. 
(1883) 315, non Retz. 7. rugosum Vidal, Phan. Cuming. Philip. (1885) 158; 
Rev. PI. Vase. Filip. (1886) 290; Rolfe in Journ. Bot. 23 (1885) 216. 
Pfiir.ii'PiNE.s (565 Cuming). Luzon, Province of Bataan, Dinalupijaii (1550 
Merrill) February, 1903: Province of Zambales, Subic {Ilallier) Decendter, 1903. 
Sp.-Fil. Trigo, Tinilrigo. 
India, China, and Malaya. 
(3) Ischaemum muticum Ijinn. Sp. PI. (1753) 1049; Miq. Fl. Ind. Bat. 3 
(1859) 496; F.-Vill. Nov. Ap]i. (1883) 315; Hook. f. Fi. Brit. Ind. 7 (1897) 
