1887. | BOTANICAL GAZETTE. 15 
v 
ERIGENIA Nutt.—Fruit much fattened laterally, nearly 
round, notched at base and apex, thin between the incurved 
carpels, smooth: carpels very thin-walled, with 5 small pri- 
mary ribs; oil-ducts one to several in the intervals, 9 to 11 
on the commissural side, which is drawn out (neck-like in 
section) into the narrow commissure; seed-section deeply 
two-lobed on the inner side, longitudinal section semilunar 
(figs. 9 and 10).—Low, diffuse, glabrous, from a deep round 
tuber, in early spring. Leaves ternately decompound, seg- 
ments oblong. Involucels foliaceous. Flowers white. 
1. E.bulbosa Nutt. Genera, i. 188. Spanorso high: leaves 
radical except those subtending the imperfect umbels.—W. 
New York and Pennsylvania westward into the Mississippi 
valley. 
CRYPTOTENIA DC.—Fruit linear-oblong, flattened 
laterally, somewhat grooved at the commissure, smooth: car- 
pels with 5 small obtuse primary ribs; a single oil-duct 
beneath each rib and in each interval, 2 to 4 on the commis- 
sural side, which also contains two bundles of strengthening 
cells (in addition to those of the carpophore) besides those 
subtending each rib; seed-section roundish, slightly concave 
on the inner face (figs. 11 and 12).—One or two feet high, 
smooth. Leaves thin, 3-foliolate. Involucre none; involu- 
cels minute or none. Flowers white. June to September. 
1, C. Canadensis DC. Mem. Umbel. 42. Leaflets large, 
ovate, 2 to 4 inches long, pointed, doubly serrate, lower ones 
lobed: fruit often becoming curved.—Canada to Minnesota 
and south to N. Carolina and Mississippi.—In this species the 
carpellary walls have two distinct layers, the outer being almost 
made up of the very broad bundles of strengthening cells, the 
inner composed of a single layer of large parenchyma cells 
set palisade fashion, and in which the oil-ducts always occur 
(fig. 13). This peculiar character, differing from any other 
umbellifer studied, serves to strengthen the position of Cryp- 
totenia as a genus distinct from Pimpinella, to which Bentham 
and Hooker consider it too closely allied, as in Pimpinella 
there is no such inner layer and the bundles of strengthening 
cells are very small and widely separated. 
EXPLANATION oF PLATE I.—Fig. 1. Fruit of Sanicula Canadensis. 
Fig. 2. Section of carpel of same: a, oil-ducts; b, seed section: ¢, pericarp; 
Fruit of Osmorhiza longistylis. Fig. 5. Section of carpel of same. Fig. 6. 
Section of carpel of O. brevistylis. Fig. 7. Fruit of Conioselinum Cana- 
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