CLXXIII. GRAMiNEyE. (J. D. Hooker.) 229 



A. Column of awn twisted. 



* Awn plumose or hairy throughout its length or nearly so. 



1. S. orientalis, Trin. ex Ledeb. FL Alt. i. 83 ; panicle narrow more 

 or less embraced by the dilated sheath of the uppermost leaf, spikelets in., 

 gls. I and II about twice as long as the silkily hairy III. Ledeb. Ic. FL. 

 Ross. t. 223 ; Trin. in Act. Acad. Pefersb. VI. i. (1830) 79 ; Kuntli Enum. 

 PI. i. 185 ; Steud. Syn. Gram. 131 ; Boiss. FL. Orient, v. 504 ; Duthie Grass. 

 N. W. Ind. 27. S. Seme-novii, lirassn. Descr. PL Thiansck. in Script. Bot. 

 Hort. Univ. Peirop. ii. 22. S. Szovitziana, Duthie I. c. 27 (non Trin.). 

 S. tartarica, Jacquem. mss. 



WESTERN TIBET, alt. 10-15,000 ft., Jacquemont, &c. DISTKIB. Westward to 

 Persia. Altai Mts. 



Stems 6-14 in., forming dense hard tufts, clothed below with shining sheaths. 

 Leaves 4-10 in., filiform, tips long capillary ; sheath of uppermost, 4-6 by i- in. 

 broad. Panicle elongate, branches and pedicels short, erect. Gls. I and II hyaline, 

 - in. long, tips slender ; I 1-nerved or 3-nerved at the base ; II 3-nerved ; III 

 cylindric, callus = about A of the gl., bearded; awn plumose throughout its length, 

 nearly straight, column about of its length. Probably a form of S. barbata. Said 

 to be the commonest grass on the Pamir. 



2. S. foasi-plumosaj Munro mss. ; panicle very narrow, branches 

 and pedicels very short, spikelets purple, gl. I and II \-\ in., Ill about 

 5 shorter than II sparsely hairy, awn capillary twice or thrice as long as 

 the spikelet very densely bearded towards the base. 



WESTERN TIBET ; Nubra, and the Lanak Pass, alt. 15-17,000 ft., Thomson. 



Stems 6-16 in., densely tufted, slender, strict. Leaves 4-6 in., convolute, 

 filiform, slightly scabrid. Panicle 26 in., sometimes sheathed ; branches and 

 spikelets distant ; gl. I and II ovate-lanceolate finely acuminate, tip and margins 

 white hyaline; I 3-nerved at the base ; II 3-nerved ; callus of IV = about J ot the 

 gl. ; awn very delicately plumose upwards with spreading hairs, column slightly- 

 twisted. 



Var. longe-aristata, Munro mss. ; gl. I and II -| in., awn 1 in. Western Tibet, 

 Thomson. 



3. S. purpurea, Griseb. in Goett. Nadir. (1868) 82; spikelets few 

 purple on long capillary sigmoidly flexuous pedicels, gl. I and II tj-1 in., 

 Ill about 3 shorter than II softly hairy, awn 2^-3 in. flexuous. S. Ifach- 

 teriana, Herb. Ind. Or. JJf. T. ; Duthie Grass. N< W. Ind. 27 (not Kav. 

 &f Kir.}. Lasiagrostis tremula, Ruprecht Serf, Thiansch. 35. 



WESTEEN TIBET ; Gnari Khorsum, alt. 17,000 ft., Schlagintweit ; Lake Eukshun, 

 15,000 ft., Lance. DISTRIB. Thianschal Mts., in Central Tibet, alt. 16,000 ft., 

 Thorold. 



Stems densely tufted, 6-10 in., filiform, sheathed below the panicle. Leaves 

 2-4 in., filiform, convolute; ligule elongate. Spikelets very few, hardly forming a 

 panicle, branches and pedicels in, or more, sometimes zigzag. Gls. I and II 

 narrowly lanceolate, dark purple with slender hyaline tips; III callus = % of the 

 gl., villous. Anther-tips naled. 



4. S. mong-olica, Turcz. ex Trin. in Bull. Sc. Acad. Petersb. i. (1836) 

 67; panicle open with few distant widely spreading capillary flexuous 

 branches, spikelets in. ovate dorsally compressed, gls. I and II purple 

 below the middle hyaline above it, III hairy, awn about twice as long as 

 the gls. Steiisd. Syn. Gram 132; Duthie Grass. N.W. Ind. 27. Lasia- 

 grostis mongholica, Trin. ex Rupr. in Mem. Acad. Petersb. Ser. VI. Sc. 



