[Vor. 4 
52 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
lanceolato-linearibus acutis, sepala purpurea fere duplo super- 
antibus. Wet ravines, Washington Mammoth Grove; May 
15.’’ It is possible that the narrow-petaled forms predomi- 
nate in certain localities, e.g., the Sierra Nevadas and about 
San Luis Obispo County. 
The varieties chloropetalum and angustipetalum therefore 
represent two independent and continuous series of variations 
in the petals of T. giganteum. 
15. T. pusillum Michx. Fl. Bor. Am. 1: 215. 1803; Rendle, 
Jour. Bot. 39: 334. pl. 426, fig. A. 1901. 
T. pumilum Pursh, Fl. Am. Sept. 1: 245. 1814. 
?Т. Texanum Buckl. Acad. Phil. Proc. 12: 443. 1861. 
This species forms a transition from the sessile-flowered 
species, of which T. sessile may be regarded as Ше type, to 
the pedunculate species such as T' erectum. Its flower may 
be quite sessile or on a pedicel 6 mm. in length, as represented 
by specimens іп Herb. Gronovius and Herb. Linnaeus. Ac- 
cording to Small,” the pedicel is 1 em. in length. T. pusillum 
is perhaps most nearly related to 7. erectum, from which it 
may have been derived. It differs from that species in its 
smaller and more slender stature, the thickness of the stem 
scarcely exceeding 1 mm.; also its leaves are oval to lanceo- 
late, obtuse, the petals delicate, smaller (1.4-2 em. long), pink 
instead of purple-brown, and the stamens slightly shorter 
than in T. erectum. The stigmas are united at the base to 
form a style about 2 mm. long, as in T. Catesbaei and T. affine. 
It is probable that Buckley's plant represents a distinct form. 
In pine lands, North Carolina and South Carolina. 
16. T. erectum L. Sp. Pl. 341. 1758; Curt. Bot. Mag. pl. 
470. 1800; Lamarck, Епсус. Meth. 8: 102. 1803; Illustr. Gen. 
Tab. 2: pl. 267, fig. 2. 1823; Lodd. Bot. Cab. 19: pl. 1838. 
1832; КІ. Serres 10: 56. pl. 990. 1854-5. 
T. rhomboideum Michx. Fl. Bor. Am. 1: 215. 1803; Redouté, 
Les Liliacées 3: pl. 134. 1807. 
1 Rendle, A. B. Notes on Trillium. Jour. Bot. 39:334, 335. 1901. 
2TFl. Southeastern U. S. 278. 1903. 
