CATALOGUE OF CANADIAN PLANTS. 391 



referred in Part IV. to S. Columbiana, belong here, if this proves a 

 distinct foi-m. No. 18, of 1889, was gathered at Tale, B.C. (Macoun) 



(2738.) S. comata, Triti. & Eupr.; Macoun, Cat. IV., 190 ; No. 20 

 MacouD, 1889 = 338 Scribner; 201 M. B. Jones (Colorado); 49 

 Eusby (Arizona); 1625 Henderson (Oregon); and 31 Tweedy 

 (Washington). 



" Awn 5J inches long, flowering glumes with callus 7 inches long." 

 (Scribner.) My No. 20 was growing in abundance in tufts on dry flats 

 at Spence's Bridge, B.C., May, 1889. (Macoun.) "No 19 is the same 

 species but the awns are only about 4 inches long, flowering glume 

 including callus 5 inches long." (Scribner.) No. 19 was abundant in 

 the same situation at Kamloops, B.C., June, 1889. (Macoun.) 



687. ORYZOPSIS. 



(2746.) O. CUS|)idata, Benth. ; Macoun, Cat. IV., 193. 



Abundant on the sandy soil just across Spence's Bridge (on the north 

 side), B.C., May, 1889. (Macoun.) 



689. MUEHLENBERCIA. 



(2749.) M. glomerata, Trin.; Macoun, Cat. IV., 194. 



Eather common in grassy thickets at Agassiz, B.C., July, 1889. 

 (Macoun.) 



693. SPOROBOLUS. 



(2757.) S. asperifolius, Thurber; Macoun, Cat. IV., 197. 



On saline flats south of Kamloops, B.C., June, 1889. (Macoun.) 

 " Spikelets sometimes 2-flowered, second flower pedicellate and im- 

 perfect." (Scribner.) 



(2758.) S. cryptandrus, Gray; Macoun, Cat., IV., 197. 



On arid soil at Spence's Bridge, and at Trout Creek at the southern 

 end of Lake Okanagan, B.C., July, 1889. (Macoun.) 



694. ACROSTIS. 



(2763.) A. canina, Linn.; Macoun, Cat. IV., 198. 



Prof. Scribner says of this species: "This is A. rubra, Linn. May 

 be called A. rubra, Linn., var. Americana. It is the same as A. rupestris, 



