The Dogbanes of the District of CoJmnl>in. So 



brous, reddish purple ; leaves spreading, oblong, macron ate -tipped, the 



lowermost (about 85 x 40) somewhat rounded at base, the uppermost 

 tapering at each end ; upperside of leaves dark, clear green, glabrous ; un 

 derside yellowish green, finely pubescent ; petioles about 5 mm. in length, 

 slender above, more robust below, finely pubescent; inflorescence in small 

 rather compact, strictly terminal but not flat topped, cymes of numerous 

 Huberect flowers, the cymes usually exceeded by the leaves ; pedicel* 2-3 

 mm. in length, subulate bracted at base ; calyx finely pubescent (this char 

 acter probably inconstant), its segments broad, distinctly less than half 

 as long as corolla tube; corolla light pink, or white strongly blotched with 

 pink inside, about 5-6 mm. in length, suburceolate or tubular, its tube 

 distinctly pentagonal, the throat not narrowed, corolla segments rounded, 

 half as long as tube, spreading but not recurved ; pods drooping, about 

 90 mm. in length. 



Remarks. Apocynum medium has essentially the habit of A. androsxmi- 

 folium though its peculiarities are slightly less pronounced. Together 

 with A. urceolifer it is readily distinguished from A. androsseinifoUu.ni by 

 its differently shaped leaves, much smaller suberect flowers in strictly 

 terminal racemes, and by the distinctly pentagonal corolla tube. The 

 form of the corolla tube varies in perfectly developed flowers from faintly 

 suburceolate to essentially short tubular, though the first is the more 

 usual. The calyx segments are very short, conspicuously less than half 

 as long as corolla tube. In drying, the corolla shrinks more than the calyx, 

 so that in herbarium specimens the latter appears relatively longer than 

 it actually is. I have examined one hundred or more living plants of 

 this species growing in vacant lots on 12th St., Brookland, D. C., where 

 Dr. Greene informs me his original specimens were collected. 



Apocynum urceolifer sp. nov. 

 (PL II, Fig. 4.) 



T;/pe No. 340,396, United States National Herbarium, collected on open, 

 dry hillside at Capitol View Park, Montgomery County, Maryland, July 

 2, 1899, by Gerrit S. Miller, Jr. 



Geographic distribution. This species has been collected at the type 

 locality and at Brightwood, D. C. 



Zonal, position. Apocynum urceolifer is probably a member of the Upper 

 Austral flora. 



Habitat. Fields and roadsides. 



Characters. Plant slender, usually less than 1 m. high, from a perennial 

 horizontal rootstock ; branches dichotomously widely spreading, glabrous, 

 strongly tinged with reddish purple ; leaves spreading, oblong, mucronate 

 tipped, the lowermost (about 90 x40) rounded or subcordate at base, the 

 uppermost tapering at each end, but more abruptly at base ; upperside 

 of leaves, clear green, glabrous ; underside yellowish green, finely pubes 

 cent; petioles 2-4 mm. in length, finely pubescent on lower side ; inflores 

 cences small, rather compact, but not flat-topped, strictly terminal cymes 

 of numerous suberect flowers, the cymes at first exceeded by the leaves, 



