296 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
Type in the United States National Herbarium, no. 1502160, col- 
lected ‘in fruticetis littoralibus’, Cojimar, near Habana, Cuba, 
September 9, 1921, by E. L. Ekman (no. 13155). 
The type specimen and other collections with broad flat rather 
thick blades are strikingly different from any other species, but there 
are several specimens with blades only about 4 mm wide and more 
slender panicles which approach P. utowanaeum. 
Rocky slopes and clearings, Cuba and Hispaniola. 
Cusa: Cojimar, Ekman 13155, Wilson 9497; Léon 305 in part, 
567, 5603, 7504; Hitchcock 141; Tracy 9089. Pastellilo, Ekman 15408; 
Cayo Guajaba, Shafer 2830. Antilla, Ekman 7308. Jauco, Léon 
11709. 
Haitt: Méle-St.-Nicolas, Leonard 13305. Port-de-Pai, Ekman H 
3974. 
Dominican Repustic: Valverde, Ekman H 13103. 
81. ICHNANTHUS Beauv., Ess. Agrost. 56. pl. 12. f. 1. 1812 
Inflorescence and spikelets as in Panicum (but more or less later- 
ally compressed), the first glume often nearly as long as the spike- 
let, the fruit acute or subacute, the margins of the lemma usually 
flat, the rachilla produced below the lemma into a minute stipe, this 
bearing on either side membranaceous appendages adnate to the 
base of the lemma and free above, the appendages often wanting 
and indicated by minute excavations only; spikelets mostly short- 
pedicellate along the subsimple branches of a panicle. Mostly 
perennial, often decumbent at base or straggling. 
Appendages of fertile lemma well developed wings. 
pneaths densely iong-villouss- =). 9 edo! ee 8. I. LEIOCARPUS. 
Sheaths more or less pubescent but not long-villous. 
Blades lanceolate-elliptic, not more than 6 times longer than wide; spikelets 
short-pediceled 2. 22 Vast Fee Ah a. Ee 7. I. NEMORALIS. 
Blades lanceolate-linear, many times longer than wide; spikelets long- 
pediceled 2822. ee EE ee ee 9. I. ICHNODEs. 
Appendages of fertile lemma reduced to scars. 
Blades petiolate, usually less than 5 mm wide, the petiole 1 to 15 mm long. 
I. MAYARENSIS. 
Blades more or less clasping, usually more than 10 mm wide (4 to 10 mm in 
I. tenuis). 
Glumes, at least the first, with attenuate tips, usually exceeding the sterile 
lemma and floret; blades thin, more or less pilose. 
Spikelets with a few long stiff hairs near the margin toward the summit 
of both glumes; plants delicate; blades rarely more than 4 cm long 
and.) cm wide. JOR eae 2 he 2 eee 3. I. TENUIS. 
Spikelets glabrous or scabrous on the midnerves only; blades up to 7 em 
lonp and 2: ei Withee =. op Rl es ee 4. I. NEMOROSUS. 
Glumes acute or acuminate but not attenuate, the first shorter than the 
spikelet. 
Plants delicate, the fertile culms 3 to 8 cm tall; blades thin, 5 to 18 mm 
long e528 2S. eekaten © SR ies ae 8 ee: 2. I. coNJUNCTUS. 
Plants stouter and taller; blades mostly more than 10 cm long. 
Blades lanceolate, 1 to 2 em wide, glabrous_-___--__--_ 5. I. PALLENS. 
Blades oval to ovate-lanceolate, 1.5 to 3.5 em wide, often pubescent 
beneath = 3") _.. eek _s2i5a ae ee eS eee 6. I. AXILLARIS. 
1. Ichnanthus mayarensis (Wright) Hitche., Contrib. U. S. Natl. 
Herb. 12: 228. 1909. 
Panicum mayarense Wright, An. Acad. Cien. Habana 8: 206. 1871. 
Cuba, Wright 3468. 
Ichnanthus wrightii Hitche., Contrib. U. S. Natl. Herb. 12: 229. 
1909. Cuba, Wright 3880. 
