a 
Two new seed-plants from the Lake Tahoe region, California 
Ernest A, MCGREGOR 
Apocynum bicolor sp. nov. 
Erect, 4-5 dm. high, wholly glabrous : lateral branches mostly 
shorter than the main stem and sterile: leaves spreading or some- 
what ascending, deep green above, pale glaucous below, ovate- 
acute, cuspidate, the largest 6 cm. x 3.75 cm., the smaller 
3.5 cm. X 2 cm., midvein almost white, prominent; petioles 3-5 
mm. long: inflorescence usually a small dense terminal, often 
cymose panicle, considerably surpassed by the leaves, or occasion- 
ally with a similar but smaller panicle in one or two axils below; 
bractlets of the inflorescence minute, subulate : calyx campanulate, 
3 mm. long, segments triangular-lanceolate, acute, with recurved 
tips, greenish, tinged with purple: flowers pale rose-tinged, cylin- 
drical, 7 mm. long, the lobes finally spreading, narrowed but obtuse ; 
tube 4 mm. long by 2.5 mm. wide: stamens 3.5 mm. long, the 
stout filaments half as long, densely pubescent, and half covered 
by the anthers, with a free, lacerate, terminal margin; anthers 
lanceolate, acute, 2.5 mm. long, the base deeply notched, with rather 
pointed inturned lobes; appendages between the stamens broadly 
ovate-turbinate, apiculate : stigma of two sessile oval lobes. 
The type is zo. 32, collected by the author Aug. 19, 1909, in 
Glen Alpine, near Lake Tahoe, California, growing in a meadow, 
alt. 2260 m. 
This species is rather intermediate between the so-called andro- 
saemifolium and cannabinum types (as they have been described 
by Greene, Pittonia 3: 229). Theerect habit of the plant and the 
cylindrical flowers belong to the cannadinum division, while the 
foliage characters and the color of the flowers belong to the other 
type. 
When the Synoptical Flora, vol. 2, part 1, was issued, in 1878, 
only two species of Apocynum were recognized in North America, 
viz., A. androsaemifolium and A. cannabinum, and the distinction 
between them was none too marked. At the present date there are 
some thirty species recognized in North America, which as a rule 
are referred to one or the other of two groups based on these two 
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