Hierochloe odorata (L.) Wahlenb. Fl. Ups. (1820) p. 32; PoaceBrnxi., SjianH II-b'b $eA- 

 lesKo, $ji. Asiax. Pocciii VI (1914) p. 103; Kpw.i. $ji. Ajit. VII (1914) p. 1552. Hierochloe 

 borealis Roem. et. Schult. Syst. Veget. II (1817) p. 513; Ledeb. FI. Alt. I, p. 92: Tur- 

 czan. Cat. Baical. no. 1289; Karel. et Kiril. Enum. PI. Fl. Alt. no. 913; Ledeb. Fl. 

 Ross. IV, p. 407; Turczan. Fl. Baical.-Dahur. (1856, I) p. 9, no. 1287. [Tab. II, Fig. 2]. 



The specimens belonging to 

 this one, gathered by me in 

 South Siberia, constitute, in 

 many respects, an intermediate 

 form between the typical spe- 

 cies Hierochloe odorata (L.) 

 Wahlenb. and Hierochloe da- 

 hiirica Trin. The culms are 

 rather short, from 20 to 30 cm. 

 high, slender, and glabrous. The 

 leaves of the fertile shoots are 

 from 1 to 2 cm. long, the sheaths 

 rifled and very hairy (f. piibes- 

 cens). The barren shoots have 

 leaves, generally rising above 

 the panicle. The leaves are 

 smooth, the margins only being 

 somewhat scabrous. The panic- 

 le is short, lax, open, and broad, 

 nearly ovate, the spikelets 

 rather numerous, and the bran- 

 ches of the panicle straightly 

 spreading. The spikelets are 

 small, oblong, or nearly circu- 

 lar, from 2,5 to 4 mm. long. The 

 glumes are broad, of unequal 

 length, one of them generally only half enclosing the florets, the other one generally 

 only slightly shorter than the florets, never projecting beyond them, membranous, with 

 a green base, and generally furnished with one dorsal nerve only, lateral nerves wan- 

 ting. At the summit more or less obtuse, never drawn out or pointed. The pales are of 

 a shining brown, glabrous, or rarely sparingly pubescent but much fringed with long 

 hairs. 



All the florets of the spikelet attain the same height. In point of the structure of 

 the spikelets these specimens agree best with Hierochloe dahurica Trin, but, according to 

 their considerable height their numerous spikelets, and spreading panicle more parti- 

 cularly with Hierochloe odorata. Upon a rather large material, H. odorata and H. 



Fig. 72. Hierochloe odorata (L.) Wahlenb. (^^^/i) 



a. Spikelet. — b. Spilielet, the glumes are removed and the 



florets distended. — c. Emply glumes. 



118 



