21 



Specimens examined.— Julian, San Diego County (Orcutt), 1889; near Potrero 

 Valley, San Diego County (Oreutt), 1890; Jauuel Vallev, San Diego County 

 (Orcutt), 1890. 



The specimens are all immature, with the hases of the panicles still subtended hy 

 the uppermost sheaths, and only a few of the spikelets barely in authesis. 



13. Calamagrostis koelerioides Vasey ; Coult. Bot. Gaz. 16: 147(1891). 

 Southern California. 



Type specimen in the United States National Herbarium, collected near .Julian, San 

 Diego County, by C. R. Orcutt, 1889-90. 



Nearly related to C. vUfcvformU, but readily distinguished by its stricter, more 

 slender, and slightly or not at all twisted culms; slightly or not at all twisted 

 sheaths; shorter, narrower, and more strongly involute leaf-blades; smaller, 

 oblong, obtuse, interrupted panicles with shorter branches; somewhat smaller 

 spikelets; broader and less pointed empty glumes; shorter flowering glume; 

 awn attached somewhat higher; hairs of callus somewhat longer, and palea pro- 

 portionately hmger. The specimens are much more mature than those of C. 

 vUfaformis, yet they exhibit smaller dimensions in almost every part. 



14. CALAMAGROSTIS ANGUSTA (Vasey) Kearney, sp. n. C. aleuiica angusta 

 Vasey Monog. Grasses U. S., Coutr. U. S. Nat. Herb. 3: 80 (1892), 



Eather tall and strict, of hard texture, with strong creeping rootstocks, erect rather 

 long innovations, few culms, and narrow, spike-like, densely flowered panicles. 

 Culms 7 to 11 dm. high, rather slender, erect, and strict (occasionally slightly 

 geniculate below), with a few short, ratlier loose, marcescent sheaths at base, 

 occasionally slightly twisted below; internodes 4, all but the lowest finally 

 greatly exceeding their sheaths, the uppermost about twice as long. Sheaths 

 rather closely embracing the culms, scabrous, especially toward summit, bearded 

 at junction with the blade (except the uppermost), sometimes Aery sparsely 

 pul)escent toward summit, thickish and rather rigid. Ligule about 4 mm. long, 

 truncate or rounded at the broad apex, thin, minutely scabrous. Blades (of 

 innovations) 5 to 25 (mostly about 1.5) cm, long, erect, cauline spreading, the 

 uppermost 5 cm. or less long, all 2 to 4 mm. wide, strongly involute at least 

 toward the filiform tip, thickish, usually rather rigid, scabrous on the nerves 

 and margins; minutely iiubcscent above. Panicle 11 to 17 (mostly 1.5) cm. long, 

 1 to 1.5 cm. wide, linear-lanceolate in outline, acuminate, erect, strict, occasion- 

 ally somewhat interrupted toward base, straw-color, faintly tinged with red 

 purple; rachis scabrous especially toward apex, its lowest iuternode 2 to 3 cm, 

 long; branches short, appressed, densely flowered, somewhat flexuous, slender, 

 scabrous-pubescent, the lower primary branches mostly in 3's, the longest 2.5 to 5 

 cm. long. Spikelets nearly 6 mm. long. Empty glumes narrow-lanceolate, sharp- 

 acuminate, ratlier sharply keeled, minutely scabrous, usually minutely hisiiidu- 

 lous on the keel, faintly tinged with purple along the nerves, the first slightly 

 longer. Flowering glume slightly to 1 mm. shorter than the second empty glume, 

 oblong-lanceolate, narrowly truncate, minutely 4-dentate, minutely and densely 

 scabrous on the back; awn attached near the base (one-sixth above or lower), 

 about 3 mm. long, nearly equaling the glume, stout, minutely scabrous, bent 

 somewhat above the middle (sometimes one-third below the apex), the lower 

 part loosely twisted, the upper part divergent at an angle of about 45 degrees, 

 exsei'ted. Palea somewhat exceeding the flowering glume, narrow-lanceolate, 

 narrowed to the obtuse apex, minutely to rather distinctly bidentate, minutely 

 scabrous on the keels. Anthers about 3 mm. long. Callus hairs rather sparse, iu 

 two lateral tufts (none dorsal), the longer, two fifths to one-half as long as the 

 flowering glume. Prolongation of the rachilla with its hairs about three-fifths 

 as long as the palea. 



Type specimen collected at Santa Cru/, Cal., by Dr. C. L. Anderson, 1891-92. 



