176 LBAIfI,BTS. 



flowered, and the equally hydrophile A . Bolandri may be found 

 like them in this particular, if rediscovered. 



Apocynum DENSiFtoRUM. Plant several feet high, but 

 sparingly branched and only at summit ; herbage glabrous and 

 everywhere glaucous, the upper face of the foliage only less 

 so than the lower ; cauline leaves ovate-oblong, 4 inches long, 

 IJ^ broad, rounded at the base and subsessile, at apex hardly 

 acute, but strongly subulate-mucronate, those of the branches 

 two-thirds as large, tapering to both ends, therefore elliptical : 

 inflorescences 3 only, one large and terminal, the others borne 

 on either side far above it, all short-peduncled and surpassed 

 by their subtending pair of leaves, exceedingly many-flowered 

 but very compact ; sepals lanceolate, acuminate, of the length 

 of the tube of the short-cylindric green corolla. 



Known only as collected by myself in the mountains of 

 Kern Co., California, near Tehachapi, June, 1889. Although 

 green-flowered, this is at every other essential point widely at 

 variance with the eastern and genuine A. cannabinum. 



Apocynum brewERI. Of the cannabinum division, and very 

 robust, tall and sparingly branched at the very summit only : 

 cauline leaves 3 or 4 inches long, V/o, to \Y\ inches wide near 

 the base, of elongated oval general outline, but sessile and 

 cordate clasping, at apex obtuse, yet with a prominent though 

 small cusp ; lower face of all leaves glaucous, the upper not so, 

 yet somewhat glaucescent : cymes few, apparently only 1 to 3, 

 far surpassed by very leafy sterile branches, short-petioled , 

 many-flowered and dense, the flowers very small ; sepals very 

 long and lanceolate, surpassing the tube of the corolla ; color of 

 flower apparently deep purplish, but the specimens are fifty 

 years old, the shade therefore beyond exact discovery. 



Yosemite Valley, California, W. H. Brewer, n. 1673 as in 

 U. S. Herb., collected 19 June, 1863. 



Apocynum thermale. Both foliage and branches suberect, 

 and all of a dull bluish-green hue almost the same on both 



