ACCBSSIONS TO APOCYNUM. 165 



Apocynum missiouriense. Plant evidently tall and large 

 as ^. cannabinum, in habit, inflorescence and flowers widely- 

 different ; main stem not known, the flowering branches 

 exceeding a foot in length and simple up to the many-flowered 

 and subcorymbose inflorescence ; rameal leaves many, short- 

 petioled, ascending, in outline exactly elliptical, ending in a 

 short-subulate mucro, the length 2V2 inches, the breadth near 

 the middle less than 1 inch ; proper cauline leaves thrice the size 

 of the rameal and of quite another pattern, being broadly lance- 

 oblong with cordate base, and 5 inches long by iM inch width 

 toward the base, all of the usual vivid-green above, though 

 with light-colored veins, and beneath only paler, not defi- 

 nitely glaucous : flowers small and very numerous, mainly 

 disposed in a broad terminal compound cyme, 2 or 3 short 

 branches each with a small cyme surpassing the terminal large 

 one in height ; sepals triangular - lanceolate, acuminate, 

 equalling the short-cylindric corolla-tube ; corolla small, either 

 white or flesh-tinted, its lobes short, ovate or oval, obtuse, 

 little spreading. 



From western Missouri, at Atherton, collected by B. F. 

 Bush, 27 June, 1909, and by him distributed for A. album, 

 to which it is far from bearing any close resemblance, being 

 many times larger, and in habit, inflorescence, and even foli- 

 age widely different ; yet Mr. Bush could not, as it seems, 

 refer his plant to A, cannabinum, and it is indeed still farther 

 removed from that than from A. album. 



Apocynum esteI/Linum. Firmly erect and strict, glabrous, 

 the stem glaucous, the foliage light-green, glaucescent, erect 

 or ascending on both stem and sterile branches, the lower 

 cauline oblong, obtuse, sessile, commonly only 1 inch long, 

 those of the branches rather larger, oblong-elliptic, acute, the 

 veins not prominent : flowers very small, in small clusters 

 below the foliage ; sepals ovate - lanceolate, acuminate, 

 equalling the tube of the corolla, this very small, subcylindric, 

 white : follicles about 2/^ inches long. 

 Lbaflbts, Vol. II, pp. 165-196. 13 March, 1912, 



