ACCESSIONS TO APOCYNUM. 177 



faces of the foliage, the plant wholly glabrous, both stem and 

 branches stout and very straight: leaves 2J^ to3J^ inches 

 long, subsessile, oblong-oval, obtuse at base, at apex only 

 abruptly and cuspidately or mucronately acute, the venation 

 green and inconspicuous : cymes short-peduncled, not equal- 

 ling the leaves subtending them : flowers of the very smallest, 

 erect on extremely short pedicels ; sepals short, deltoid-ovate ; 

 tube of corolla short-cylindric, the segments short, ovate, 

 slightly spreading, the color apparently dull pale flesh-color. 



Tessajara Hot Springs, Monterey Co., California, June, 

 1901, collected by A. D. E. Elmer. Strictly of the cannabinum 

 alliance ; a comparatively small plant, with peculiarly strict 

 habit, as well as its own characters of leaf and flower. 



Apocynum longifolium. Of the alliance of A. cannabi- 

 num, perhaps as tall, but comparatively very slender, also very 

 sparingly branching and few-flowered, the stem and branches 

 purple and but little glaucous, the herbage light green and 

 glabrous, the foliage almost equally glaucous on both faces ; 

 uppermost leaves of the main stem 5 inches long, barely 1 inch 

 wide, those of the branches 3 inches long or more, all elliptic- 

 oblong, tapering below to a short petiole, at apex ending 

 sharply by a long almost subulate cusp or mucro : cymes few, 

 all greatly surpassed by the subtending leaves, the flowers not 

 many, of the smallest, even fairly minute ; sepals ovate lanceo- 

 late ; corolla with cylindric tube and ovate lobes, the color 

 dull pale greenish purple. 



A Californian species, collected on Sespe Creek, near Ten 

 Sycamore Flat, Ventura Co., 9 June, 1908, by Abrams & Mc- 

 Gregor. Remarkable for the great length of its leaves as well 

 as the peculiar pointing of them. 



The foregoing species, to the number of more than twenty, 

 are of that group headed by A. cannabinum. I now proceed 

 with the results of a like inspection of the materials in our 

 herbaria representing the allies of A. androsaemi/olium. The 



