222 THE FLORA. 



fi bnto'sa. A small, early-flowering herb, Western N. Y. to Mo. Stem arises 

 from a roundish tuber deep in the ground. The root leaf is thrice ternate. The 

 involucrate leaf twice ternate. The dark-brown stamens with the little white 

 petals suggest its common name. 



6. CICU'TA. "Water Hemlock. 



Calyx 5-toothed. Petals with the point inflected. Fruit roundish, 

 tittle contracted on the sides so as to appear somewhat double. Seeds 

 with 5, flattish, equal ribs, 2 of them on the margin. V Poisonous herbs 

 with compound leaves and perfect umbels of white flowers. Involucre 

 few-leaved or 1. Involucels many-leaved. 



3 O. macnla'ta. Spotted Water-Hemlock. Stem streaked with purple, 3-6f. high, 

 smooth, striate, hollow. Lower leaves triternate and tripinnate, segments lan- 

 ceolate, serrate. Umbels 2-4' broad. Fruit 10-ribbed. Involucels of 5 or 6 

 short, slender, acute bracts. Common in wet meadows. July, Aug. 



2 C. bulbi'fera. Narrow-leaved Water- Hemlock. Stem green, striate, slender, with 

 little bulblets in the axils of the branches. Leaves bi-ternately divided. Leaf- 

 lets linear or lance-linear, 2-4' long, with distant teeth. In wet meadows and 

 ewamps. Aug. 



7. THAS'PIUM. Alexanders. 



Calyx minutely 5-toothed. Fruit elliptical, roundish across, not flat- 

 tened either way, seeds each with 5 winged ribs. y Leaves divided. 

 Involucre none, involucels few-leaved. The species resemble the Ziziat 

 except in their fruit. May, June. (Figs. 483-6.) 



1 Eoot leaves simple, cordate, stem leaves once-ternately divided.. ..2 



1 T. barbino'de. Leaves bi- or tri-ternate, Ifts. cut-serrate. St. hairy at joints. 



2 T. au'reum. Golden A. Fruit oval. Flowers. yellow. Stem 2-3f. high. 



8 T. atropurpu'renm. Purple A. Fruit roundish. Flowers dark purple. Stem 2-8f. 

 high. S. M. 



8. ZIZTA. Alexanders. 



Calyx minutely 5-toothed. Fruit oval or ovate, flattened at the sides 

 so as to appear somewhat double. Seeds each with 5 ribs which are not 

 winged, but thread-like. y Smooth, with divided leaves and yellow 

 flowers. Umbels compound, with no involucre or involucels. 



21 integer'rima. Entire-leaved A. Root and stem leaves bi- and tri-ternate, lenfleUt 

 oatire. Plant l-2f. high, in rocky woods. May-July, 



