363 



Panicum (Ptychophyllum) pringleiVasey, sp. iiov. Culnistufted, apparently peren- 

 nial, 8 to 10 inches high, branching near the base: leaves mostly radical (th«> 

 upper part of cnlni naked), about 2 inches long, 2 to 3 lines wide, acute : panicle 

 racemose, 2 to 3 inches long, consisting of 3 to 1 alternate, nearly sessile, 1-sidod 

 spikes: spikes mostly | to 1 inch long, and containing 12 to lospikelets on alter- 

 nate sides of the flattened rachis, each 8]»ik«;let with a simple persistent bristle 

 at its liaae ; the bristles rather larger than the si)ikelcts : spikolets conical-oblong, 

 about 2 lines long, acute; first glume I as long as spikelet, obtuse, obscurely 

 3-toothed; second glnme 9-uerved, a little shorter than the acute 5-norved male 

 floral glume which incloses the nearly equal, acute palet, and the 3 stamens; fer- 

 tile spikelet oblong 3-nerved, with a short, pointed apex. Mexico, Pringle Coll. 

 of 1888, No. 2047, and Coll. of 188'J, No. 2423; also from Colima, January'O to Feb- 

 ruary 6, 1891, No. 1256. 



Panicum sanguinale ciliare (Ketz.) Vascy, liull. No. 8. Div. I?ot..23 (1889); Pan- 

 icum ciUarc Ketz. Obs. Hot. fasc. 6, 16 (1786). In the low ground between the 

 mountains and lagoon. Manzanillo, December 1 to 31, 1890. No. 1083. 



This variety differs in its usually smaller size, more prostrate habit, shorter 

 leaves, fewer spikes, and in the strongly ciliate-fringed third glume. 



Panicum trichanthum Nees, in Mart. Fl. Bras. ii. 210 (1829). In shady places in gar- 

 dens. Colima, .Fannary 9 tO'Febrnary 6, 1891. No. 12.")7. 



Oplismenus humboldtianus nudicaulis Vasey. This is near Oplismenus UnmhoJdt- 

 ianiis vuiUcuH Fournier, but differs I'rom that by having larger flowers, with 

 longer awns, and the hermaifhrodite flower not muiticous. Colima, January 9 

 to I'ebruary 6, 1891. No. 12.58. 



OpliBmenua setariu&(Lam.) Roem. & Schnltz, Syst. Veg. ii. 481 (1817) ; Fanicnm seta 

 rium Lam. Encyc.i. 170 (1791). In the Avet bottom near the bay. J[anzanillo, 

 December 1 to 31, 1890. No. 1090. 



Cenchrus echinatus L. Sp. PI. ii. 10.=jO (1753). Found sparingly on the monntaiu 

 sides. Manzauillo, December 1 to 31, 1890. No. 1086. 



Pennisetiim setOBum Kich. in Pers. .Syn. i.72 (1805). Crassy bottoms of a creek. 

 Colima, .January 9 to February 6, 1891. No. 1269. 



Aristida (Ortachne) manzanilloana ^'asey, Contr. Nat. Herb. i. 282 ( 1893). Ajipar- 

 ently annual; culms tufted. 2 to 2i fe(^t high, smooth, slender, erect, .simide, or 

 geniculate and brancliing below; leaves 2 to 3 inches long, plane below, con- 

 duplicate above, not rigid, very narrow, almost setaceous; sheaths shorter than 

 the blade; panicle racemose, simple, 4 to 5 inches long; branches single, or 2 or 

 3 together^ tlu^ lower about 1 inch long, sessile, with 3 to 5 somewhat crowded 

 spikelets; empty glumes about 3 lines long, awn-pointed, nearly equal; floral 

 glumo with the undivided awn about 1 inch long when mature, scjibrous on the 

 keel, not twisted, flattish, conimonlycurved above. 



C(dlected in the mountains about Manzanillo, December 1 to 31, 1890. No. 

 1084. This spe<ics differs from A. fnniis jUxnosa in its culms being slender and 

 flexiious, leaves softer, and spikelets -with a ii'w scattered hairs. 



Aristida tenuis (?) (H.H.K.) Knntli, Pev. (Jrain. i. 62 (1829-1835); Streptachnr tenuis 

 II. 15. K. Nov, Gen. et. Sp(!C, i. 124 (1815). Manzanillo, January 9 to February 6, 

 1890. No. 1091. 



Muhlenbergia exilis P'ourn. Mex. PI. Gram. 84 (1886). Along the* banks of a creek. 

 Colima., January 9 to February 6, IS91. No. 1271. 



Sporobolus argutus (Xees) Kuntli, Enum. Pi. i. 215 (1833); J'ilfa argitia Nees in 

 Mart. Fl. Bras. ii. 395 (1829). Very common along the coast. Agiabampo, Octo- 

 ber 3 to 15,1890. No. 814. 



Chloris radiata (?) Swartz, Prod. Veg. Ind. Occ. 26 (17^(8). Common along water 

 ditches. Colima. .(anuary 9 to February 6, 1891. No. 12,53. 



Bouteloua bromoides I^ag, Gen. et Spec. Nov. 5 (1816). Common on grassy plains. 

 Colima, .January 9 to February 6, 1891. No. 12,54. 



