278 



PKOCEEDINGS OF THE AMERICAN ACADEMY 



anth-segments spreading, linear-lanceolate, 2 or 3 lines long: capsule 

 strongly reflexed, narrowly oblong-ovate, 3| lines long including the 

 turbinate base, with spreading beaks : seeds angled, not margined, 2 

 to 2i lines long. — Am. Journ. Sci. 42. 46, and Manual, 525. Helonias 

 graminea, Sims, Bot. Mag. t. 1599. Veratrum angustifolium, Pursh ; 

 Gray, Rev. Melanth. 120. Xerophyllum gramineum, Nutt. Gen. 1. 

 235. Alleghanies, from Virginia to S. Carolina. 



2. S. robustum. Resembling the last : stem stout, leafy, 3 to 5 

 feet high, erect: leaves 4 to 10 lines broad: panicle or raceme often 

 2 feet long, frequently compound with numerous slender branches : 

 perianth-segments 3 or 4 lines long, white or green: capsule erect, 

 ovate, 4 lines long, with recurved beaks : seeds (immature) somewhat 

 longer. — Pennsylvania to Ohio, Tennessee and South Carolina. It 

 has been ordinarily included in the last. 



3. S. Occident ale, Gray. Stem slender, a foot or two high, 

 sparingly leafy: leaves linear to oblanceolate (3 to 12 lines wide): 

 raceme simple or branched at base : flowers all perfect, campanulate, 

 greenish-purple, 4 to 7 lines long, about equalling the pedicels ; seg- 

 ments linear-lanceolate, with recurved tips : capsules at length erect, 

 6 to 8 lines long, attenuate into the elongated slender styles : seeds 

 linear, flat and winged, 3 or 4 lines long. — Proc. Amer. Acad. 8. 

 405. Oregon to British Columbia. A Mexican species, S. frigi- 

 ddji, Kunth ( Veratrum, Cham. & Schlecht.), tall, with large purple 

 flowers and conspicuous bracts, seems rightly referred to this genus. 



42. ZYGADENUS, Michx. 



* Glands 2, orbicular, above the broad claw : root rhizomatous : flowers 



perfect. 



1. Z. glaberrimus, Michx. Stem 2 to 4 feet high, leafy : leaves 

 2 to 6 lines broad : panicle broad, with ovate greenish bracts : peri- 

 anth adnate to the base of the ovary : segments 6 lines long, oblong- 

 lanceolate ; glands conspicuous : seeds linear, scarcely margined, 2 J 

 lines long. — Fl. 1. 214, t. 22. Helonias bracteata, Sims, Bot. Mag. 

 t. 1703 ; Lodd. Bot. Cab. t. 1330. Helonias glaberrima, Link. Vir- 

 ginia to Florida and Alabama. 



* * Gland covering more or less of the base of the perianth-segments : bulb 



ovate; coats membranous. 

 -t- Flowers rather large, mostly perfect. 



2. Z. elegans, Pursh. Stem J to 3 feet high : leaves glaucous, 

 2 to 6 lines broad : raceme simple or sparingly branched below, often 



