Okder G3.— the UMBELWORTS, 213 



£. bulbo'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 whito 

 petals suggest its common name. 



6. CICU'TA. Water Hemlock. 



Calyx 5-toothed. Petals with the point inflected. Fruit roundi.sh, a 

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

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

 with compound leaves and perfect umbels of white flowers. Involucre 

 few-leaved or 1. Involucels many-leaved. 



1 C. macula'ta. Spoiled Water- Hem lock. Stem streaked with purple, 3-Cf. 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. Jul?/, Aug. 



2 C. bixlbi'fera. Karroiv-leaved Water- Hemlock, Stem green, striate, slender, Avith 



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 

 swamps. Aug. 



7. TIIAS'PIUM. Alexanders. 



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

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

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

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



1 Root 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. 



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

 high. S. M. 



8. ZIZ'IA. 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. — U Smooth, with divided leaves and yellow 

 flowers. Umbels compound, with no involucre or involucels. 



Z. integer'rima. Entire-leaved A. Koot and stem leaves bi- and tri-ternate, lualKta 

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



