HITCHCOCK AND CHASE — GRASSES OF THE WEST INDIES. 333 



MISCELLANEOUS SPECIES. 



73. Panicum grande Hitchc. & Chase, Contr. U. S. Nat. Herb. 17: 529. /. US. 

 1915. 



Lakes, ponds, and swamps, growing in the water, Panama and Trinidad to 

 Para. Originally described from Panama. ColAt^ : £JL^^*^- 3 p k "J 



74. Panicum zizanioides H. B. K. Nov. Gen. & Sp. 1 : 100. 1816. 



Moist, usually shaded places, Mexico and Cuba, Jamaica, and Trinidad to 

 Paraguay. Originally described from Colombia. 



75. Panicum hirtum Lam. Encycl. 4: 741. 1798. 



Damp shady places, Trinidad to Brazil. Originally described from Cayenne. 



37. ICHNANTHUS Beauv. 



Inflorescence and spikelets as in Panicum, the first glume often nearly as 

 long as the spikelets, 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. 



Appendages of fertile lemma well-developed wings. _ s . 



Sheaths densely long-villous 6. I. leiocarpus. 



Sheaths glabrate or somewhat pilose. 



Blades lanceolate-linear, many times longer than wide ; spikelets long- 



pediceled 8. I. ichnodes. 



Blades lanceolate-elliptic, not more than 6 times longer than wide. 



7. I. nemoralis. 

 Appendages of fertile lemma reduced to scars. 



Blades, or some of them, narrowed into a petiole ; plants delicate ; blades 3 



to 5 mm. wide 1. I. mayarensis. 



Blades more or less clasping, often oblique at base, usually over 1 cm. wide. 



Glumes 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 over 



4 cm. long and 1 cm. wide *. 2. I. tenuis. 



Spikelets glabrous or scabrous on the midnerves only; blades up 



to 7 cm. long and 2 cm. wide 3. I.memorosus. 



Glumes acute or acuminate but not attenuate, the first shorter than 

 the spikelet ; blades firmer. 

 Blades oval to ovate-lanceolate, 1.5 to 3.5 cm. wide, often pubescent 



beneath 5. I. axillaris. 



Blades lanceolate, 1 to 2 cm. wide, glabrous . 4. I. pallens. 



1. Ichnanthus mayarensis (Wright) Hitchc. Contr. U. S. Nat. Herb. 12: 228. 

 1909. 



Panicum mayarense Wright, Anal. Acad. Cienc. Habana 8: 206. 1871. 



Ichnanthus wrightii Hitchc. Contr. U. S. Nat. Herb. 12: 229. 1909. 



A slender, straggling, sparingly branching perennial with delicate but wiry 

 culms, small lanceolate spreading, often petioled blades, and terminal panicles 

 of few to several simple ascending branches with glabrous short-pediceled 

 spikelets. 



Dry pine woods and palm barrens, Cuba. Known only from Cuba (Mayarf, 

 Woodfred, Campo Florido, and Arroyo Hondo). The type specimen of Panicum 



