.0 
CRYPTOT^i^NIA DC. Mem. Umbel. 42.— Glabrous 
perennials, with thin 3-foliolate leaves, no involucre, involucels of 
minute bractlets or none, and white flowers. 
Bentham & Hooker consider this genus to be too near Pimpinella, but 
the fruit characters are very different. In Crypfotcenia the carpellary wall 
is compos«d of two distinct layers, the out.“r being almost made up of the 
very broad bundles of strengthening cells, the inner composed of a single 
layer of large parenchyma (‘ells in which the oil-tubes always occur. In 
Pimpinella the bundles of strengthening cells are very small and 
widely separated, and there is no such inner layer. 
1. C. Canadensis DC. 1. c. One to three feet high: leaf- 
lets large, ovate, 2 to 4 inches long, pointed, doubly serrate, often 
lobed: umbels irregular and unequally few'-rayed; pedicels very 
unequal, from a line or tv/o to an inch long: fruit 2 to 8 lines long, 
often becoming curved. (Fig. 158.) 
Canada to Minnesota, and south to N. Carolina, Georgia, Mississippi, 
and Texas. FI. June to September. 
58. LEPTOCAULIS Nutt, in DC. Prodr. iv. 107. — Very 
slender smooth branching annuals, with finely dissected leaves 
having filiform or linear segments, and small white flowers in in- 
volucellate very unequally few-rayed pedunculate umbels. 
This genus is referred to Apitim by Bentham & Hooker, but the dif- 
ferences in its fiuit structure are so great that only similarity in habit 
could have suggested suc-h an association. 
1. L. echinatUS Nutt. 1. c. A span to a foot high: fruit 
with rather narrow commissure, echinate with soreadino- hooked 
bristles, about line long; ribs obsolete. (Fig. 
echinatum Benth. & Hook. Gen. Plant, i. 888. 
Alabama to Arkansas, westward to Texas (Hall, Reverchon, AHsm 
Cro/f), New Mexico {Wripht, Greene), Arizona. (Pr/ngfe, Pur*.s//), and S. 
California ( IT. F. Parish). FI. April and May. 
2. L. divaricatus DC. Mem. Umbel. 89. t. 10. One to two 
feet high, with spreading branches: umbels more diffuse than in 
the last and usually with fewer ra^ s: fruit with broader commis- 
sure, tuberculate, ^ line long; ribs somewhr.t prominent. (Fig. 
155 .) — Apitim divaricatum Benth. & Hook. 1. c. 
North Carolina to Florida, and westward to Kansas (Oyster), Arkansas 
{Nutlall), Indian Territory (Palmer), and Texas; also rare on balla,st near 
Phil.adelphia (Parker). FI. April. 
