dahurica seem, on the whole, to become completely merged. Systematically, H. 

 dahurica must therefore, most properly, be regarded as an easterly geographical sub- 

 species of the typical H. odorata. The specimens found by me and mentioned here, 

 thus seemed to remind much of this H. odorata subspec. odorala (Trin.) Rather com- 

 mon in sandy places near Minusinsk and on the Abakan Steppe, and in grass-grown 

 places on the islets in the rivers Yenisei and Abakan. Flowering in June. 



Distribution: Northern temperate zone of the old and the new world. 



Hlerochloe alpina (Lilj.) Roem. et. Schult. Syst. Veget. II (1817) p. 515; Ledeb. 

 Fl. Alt. I, p. 92; Turczan. Cat. Baical. no. 1290; Ledeb. Fl. Ross. IV, p. 408; Po!KeB0^^, 

 3jiaKH II-BTE. (DeA^ieHKO, iDji. AsIet. Poccia VI (1914) p. 101; Turczan. Fl. Baical.-Dahur. 

 (1856, I) p. 9, no. 1289; KptM. «>.i. Ajit. VII (1914) p. 1554. 



The specimens collected are distinguished by their small spikelets, the length of 

 which varies from 4 to 5 mm. The structure of the glumes and the florets, for the rest, 

 agrees with the typical form. This one is separated by me as: 



subspec. microstachya nov. subspec. 



Spiculae minores quam in forma typica, fere 4 — 5 mm. longae. 



Collected flowering at the end of July, in the Altaian, above the limit of trees, in 

 places grown with moss and lichens. 



Distribution: Arctic and alpine regions of the northern hemisphere, and on New- 

 Zealand. 



Stipa pennata L. Spec. PI. ed. II (1762) p. 115; Ledeb. Fl. Alt. I, p. 84; Ledeb. Fl. 

 Ross. IV, p. 450; KpHji. ^ji. Ajit. VII (1914) p. 1557. 



subspec. Joannis (Celak.) Richt. PI. Eur. 1 (1890) p. 32; Po}KeI3II^'B, 3jtaKH III-bb 

 3>eAieHK0, *.i. Asiax. Pocciii Xll (1916) p. 157. 



Very characteristic plant of the steppes, about Minusinsk, and on the Abakan 

 Steppe, where I have gathered it flowering in June, and on the Ulu-kem Steppe past 

 flowering at the end of August. 



Distribution: Middle, southern and eastern Europe, and adjoining portions of 

 Asia to Turkestan, Persia, Afghanistan, Siberia, northern Mongolia, India. 



Stipa capillata L. Spec. PI. ed. II (1762) p. 116; Ledeb. Fl. Alt. I, p. 84; Turczan. Cat. 

 Baical. no. 1272; Turczan. Fl. Baical.-Dahur. (1856, 1) p. 16, no. 1297; Ledeb. Fl. Ross. IV, 



p. 448; KpM.T. <I>ji. Ajit. VII (1914) p. 1560; PoH{eBHi;i>, SjiaKH III-bii '5e;i;qeiiK0, $ji. Asiax. 

 Pocciii XII (1916) p. 167. 



On the Abakan Steppe, and scattered on the steppes about the Ulu-kem, between 

 Tapsa and Cha-kul. Done flowering in August. 



Distribution: Middle and southern Europe, Turkestan, northern Persia, southern 

 Siberia, Mongolia, and northern China. 



119 



