162 
UMBELLIFERJE. (PARSLEY FAMILY.) 
mon, especially southeastward. May, June. — Plant with much the 
appearance of Thaspium aureum. 
2. Z. aiirca, Koch. Lower and root-leaves once , the upper 
twice , ternately divided ; leaflets oblong-lanceolate, acute, sharply ser¬ 
rate and often cut, the end ones tapering into a wedge-form base or 
winged stalk ; fruit oval. — Woods and river-banks, Massachusetts to 
Michigan. June. — Plant 2° high : umbel rather dense. 
* * Oil-tubes 3 in each interstice of the scarcely ribbed fruit. 
3. Z. fntcg£rrillia, DC. Leaves all 2- 3-ternately divided; 
leaflets ovate or oblongs entire , obtuse, pale beneath ; rays of the umbel 
long and slender; fruit rather narrow-oval. — Rocky copses, W. Ver¬ 
mont to Michigan. June. 
16 . BUPLEURUM, Tourn. Thorough-wax. 
Calyx-teeth obsolete. Fruit ovate-oblong, flattened laterally or 
somewhat twin, the carpels 5-Tibbed, with or without oil-tubes. 
Plants with simple entire leaves and yellow flowers. (Name from 
3our, cm os ?, and n-Xfopov, a rib ; it is uncertain why so called.) 
1 • B. l'Otiimlifoliuiu, L. Leaves broadly ovate, perfoliate; 
involucre none; involucels of 5 ovate leaflets, longer than the urn- 
bellets. Escaped from gardens, and sparingly naturalized in New 
York and Pennsylvania. 
H18COPEE1JRA, DC. Mock Bishop-weed. 
Calyx-teeth awl-shaped. Fruit ovate ; the carpels each with 3 
slender sharp ribs on the back, and 2 broad lateral ones united 
" ^ a '^tokened corky margin : interstices with single oil-tubes. 
Smooth and slender branched annuals, with the leaves finely 
dissected into bristle-form divisions, and white flowers. (Name 
from $ t W>r, a disk , and irXfvpoV, a rib.) 
1 B. capill&cea, DC. Umbel few-rayed ; leaflets of the 
involucre 3-5-cleft; involucels longer than the umbellets. — Brack- 
~ swa ™P 9 » Massachusetts to New Jersey and southward. July- 
Qct - Plant (P -20' high : flowers and fruit small. 
18. CICi TA, L. Water Hemlock. 
^alyx minutely 5-toothed. Fruit subglobose, a little contracted 
. 8 ides, the carpels with 5 flattish and strong ribs : interstices 
Sln °^ e tu ^ es * Marsh smooth perennials, very poisonous, 
, 1 i T Pinnately 0T ternatel y compound leaves, the veins of 
the lanceolate leaves terminating in the notches. Involucre few- 
