9 



lieptochloa mucronata pulchella Scribn. Bui. Torr. Bot. Clulj, 9 : 147. 1882. 



Benson, No. 1989. This variety is the small tufted form and extends from Missis- 

 sippi to Arizona and IMexico. From the specimens in the U. S. N'ational Her- 

 barium it is evident that its small size is due to habitat. 



L.EPTOCHLOA PIL.OSA Scri1)n. sp. nov. 



A c-espitose, rigid, s<jme\vhat purplish perennial about 3.5 dm. high, with papillate- 

 bispid sheaths and terminal panicles of many slender, spreading spikes 3-6 cm. 

 long. Culms glabrous, somewhat branched below; sheaths usually ekceeding 

 the internodes, rather loose, pilose with long, weak, spreading hairs, each from a 

 dark-colored glandular papilla; ligule a lacerate fringe al)out 2 mm. long; leaf- 

 blades 5-12 cm. long, 4-6 mm. wide, rigid, ascending, acute, subauriculate at 

 the hi^se, often somewhat involute, and with few scattered papillate hairs on the 

 upper surface, glabrous beneath. Spikelets about 2 mm. long, 2- to 3-flowered; 

 empty glumes subequal, acute; flowering glumes obscurely emarginate, not 

 mucronate, about 1.5 mm. long. 



Type specimen collected in sandy soil, Dappan, Travis Co., Texas, 294 J. E. Bodin, 

 Septend)er, 1891. 



No. 1603 Griffiths, Tucson, Arizona, September, 1900, is apparently the same, differ- 

 ing only in its shorter leaves and panicle branches. 



This species is closely related to LeptocMoa mucronata, but is at once distinguished by 

 its rigid leaves and papillate-pilose sheaths. 



Iieptochloa pringlei Beal, Grasses N. A. 2 : 426. 1896. {Diplachne pringlei Vasey, 

 1. c.) Dragoon Mountains, No. 1850; Rincon Mountains, No. 1801. 



Leptochloa viscida (Scribn.) Beal, Grasses N. A. 2:434. 1896. {Dqdachne 

 viscida Scribn. Bui. Torr. Bot. Clul), 10 : 30. 1883.) 



Benson, No. 1988; No. 1968, from the same locality, is a lax form of this species. 



Pappophorum wrightii S. Wats. Proc. Am. Acad. 18 : 128. 1883. (P. horeale 

 Torr. Pac. R. R. Rept. 4^ : 155. 1857. Not Griseb. 1853.) 



Mescal, No. 1827; Rincon Mountains, No. 1673; Vales, No. 1668; University grounds, 

 Tucson, No. 1525; Cochise; No. 1908; Pearce, No. 1925. 



Pappophorum vaginatum Buckl. Prel. Rept. Geol. and Agrl. Surv. Texas, App. 1. 

 1.S6(). [P. aperttua :\Iunro in Scribn. Bui. Torr. Bot. Club, 9 : 148. 1882.) 



Fairbank, No. 1969; University grounds, Tucson, No. 1538. 



As Buckley's name is the earliest one published for this species it is here taken up, as 

 both Buckley's and Munro's species were based on the same plant, No. 803 C. 

 Wright, Texas, 1849.i At the time the description of /''. apertinn was publi-shed it 

 was supposed that P. vaginatum was only an herbarium name, although it had 

 been published many years before. On account of its very obscure publication 

 it was not listed in Index Kewensis. 



Cottea pappophoroides Kunth, Rev. Gram. 1 : 281, /. 3;.'. 1835. 



Near Pearce, No. 1939. 



Arundo donax Linn. Sp. PI. 81. 1753. 



No label; probably University grounds, Tucson. 



Triodia mutica (Torr.) Scribn. Bui. Torr. Bot. Club, 10:30. 1883. {Tricuspid 



mutka Torr. Pac. R. R. Rept. 4 : 156. 1857.) 

 Tombstone, No. 1976; Mescal, No. 1812, frequent on gravelly Ijanks. 



TBIODIA PILOSA (Buckl.) n. comb. {Uralepls {Trieuspis) jjilosn Buckl. Proc. 

 Acad. Nat. Sii. Phil. 1862 : 94. 1862; Trieuspis acuminata Munro in A. Gray, 

 1. c, 335; Sierjlingia acuminata 0. Kuntze, Rev. Gen. PI. 2 : 789. 1891; Sieglingia 

 pilom Nash in Britt. & Br. Illus. Fl. 3 : 504. 1898.) 



Tombstone, No. 1975. 



1 Scribn. Bui. Torr. Bot. flub. 9 : 14S. 1882. 



204:82—01 2 



I 



