296 GRA^riNE.E. Trisdum. 



Mendocino County {Bolandn; n. 6122) ; (^rcj^on {PickrriiKj) ; also Sitka. Tin; consjiicuous in- 

 equality of the f,'luMies, ami the Ion;,' eaiiillaiy liranchesol' the imnicle, which are naked below, ilis- 

 tiuguish it Ironi the next, which has lieen eont'oumleil with it. 



2. T. canescens, lluckl. Culins '1 to 4 feet hij^li, tlio llat leaves and .slifaths 

 smootli Of pulicscoiit : iiauielo (i lo \'l iiiclii's loii^', iiariow, soiiiowlial crmvclod willi 

 suberoct branches, tlower-bearin^' belnw the middle or to the base; spikcdets 2-3- 

 jlowered, narrow : lower ylunie narrow, acute, about one-fourth shoiter than the- 

 broad ovate-lanceolate upper one : lower palet about 4 lines long, narrow, tuberculate- 

 roughened, long subulate pointed, the awn stout and about twice its length. — 

 Proc. Acad. Philad. 18G2, 100; Gray in same, 337. T. datum, Nutt. in Herb. 

 Acad. Philad. ; Poland. Cat. 34. 



San Francisco and elsewhere, Bolander, n. 4744, 4758, 6077, 6122. Varies in the wiilth of the 

 leaves and density of the panicle, which is often purple-tinged. Some sj)eeiniens have the leaves 

 more or less hairy and the sheaths retrorsely pilose, which is the tyjiical form collected by Nut- 

 tall and described by Buckh-y. In some of Mr. Bolamler's earlier distributions this was sent out 

 as T. cerauHin, Trin. 



3. T. barbatum, StcMul. Culm geniculate below and sometimes branched, 

 1 or 2 I'eet high, the lunceolate leaves 3 or 4 inches long. Hat and with the sheaths 

 pilose : panicle 3 to 6 inches long, the lower rays slender, suberect, few-tlowered, the 

 upper short, 1-flowered ; .spikelets large, G to 9 lines long, 3 -^-ilowered, much llat- 

 tened : glumes narrow, hairy on the keel, acute, the upper somewhat longer, 3-nerveil 

 and nearly e(pialling tlie Hunt ; joints of rhachis slmrt, nearly smooth : lower palet 

 G lines long, hirsute all over, the subulate teeth 3 or 4 lini's long, the btout awn 

 about as long as the palet and twisted below ; upper [jalet about ecpialling the lower, 

 hairy on the nerves : ovary elongated, not so coi)iously hairy as in the other two 

 species, but distinctly so. — Syn. Gram. 229. 



San Francisco, Oakland, and elsewhere {Bolander, n. 1551, 6128) ; collected also on the Ives 

 Colorado Expedition. With the exception of being liairy the specimens agree well with Steudel's 

 description, drawn from Chilian specimens. It is much the largest-tlowered species, with the 

 appearance of a Bromus. 



* * Panicle dense and spthc-like : ovary smooth. 



4. T. subspicatum, IJeauv. Culms tufted, perennial, 4 inches to 2 feet high, 

 smooth or tlowny-: leaves llat and smooth or with the loose sheaths pubescent ; ligule 

 long : panicle 2 to G inches long, dense and oblong-ovate, or elongated and several 

 times interrupted below, shining and more or less jnirplish ; spikelets llat, 2-3- 

 tlowered : lower glume shorter, tlie upper about eipialling the floret-s buth ciliate on 

 the keel ; lower palet 3 lines long, smooth or minutely scabrous, the divergent awn 

 about its own length. — Kunth, Enum. i. 29.5, and Suppl. 248 ; 8teud. Syn. Gram. 

 225. T. airoides, Poem. & Schult. ; Trin. in Mem. Acad. 8t. Petersb. 1831, G4. 



Var. moUe, (iray. Culm and foliage minutely soft-downy. — Man. G41, t. 12. 

 T. molle, Trin. 1. c. ; Torr. Fl. N. York, ii. 4.")2, t. 154. Avena mollis, Michx. 



Var. muticum, P>olan<ler, in herb. I'anicle elongated and interrupted below ; 

 the tlorets awnless or very shortawned. 



On the Upper Tuolumne (Bolander, n. 5019, var. muticum), and in the high Sierras at 9,000 

 to 11,000 feet altitude, Brewer, n. 1947, 2002 (var. molIc), 2044. From New England westward 

 along the Lakes, in the higher mountains from Colorado to California, ami northward to the 

 . Arctic Ocean. The specimens from the higher localities are only about 4 inches high with very 

 dense ovate spikes. In var. vvuticuiii the lower palet is sometimes entire as well as awnless, 

 but neither character is constant. 



35. AIRA, binn. Haik-Ghas.s. 

 Panicle loose (rarely contracted), open, with slender mostly capillary bi-anches. 

 Spikelets small, with two perfect flowers, the upper somewhat distant upon the 

 rhachis, often with a ])edicel or rudiment of a third flower. Glumes thin, mem- 

 branaceous, 1-nerved, acute, eipialling or exceeding the llorets. Lower palet thin 



