262 UMBELLIFERZ. CRANTZIA. 
ERYNGIUM, 
jection smaller. California and Nevada. 
Var. Leibergi C. & R. Rev. Umb. 92. Tall andslender, a foot or 
more high, with petioles correspondingly elongated. Sand hills in. the 
Bitterroot Mts., Idaho. 
18 CRANTZIA Nutt. Gen. i, 178. 
Small glabrous perennial herbs, creeping and rooting in the 
mud, with leaves reduced to hollow cylindrical. or awl-shaped 
petioles, jointed by transverse partitions, minute involucral 
bracts, and simple few-flowered umbels of white flowers. Calyx- 
lobes small. Fruit globose, slightly flattened laterally, glabrous. 
Carpel with filiform dorsal and intermediate ribs; laterals very 
thick and corky next the commissure. Oil-tubes 2 on the com- 
missure. Seed terete. 
C. liniata Nutt.1l.c. Leaves very obtuse, 1-3 inches long, 1-2 lines 
broad: fruit a line long, the thick lateral wings forming a corky margin. 
In salt marshes, Vancouver Island to Oregon and the Atlantic Coast. 
19 CGENANTHE L. Gen. n. 352. 
Mostly aquatic glabrous herbs, with succulent stems, pinnate 
or decompound leaves, and usually involucrate umbels of white 
flowers. Calyx-lobes rather prominent. Fruit globose, slightly 
flattened laterally if at all, glabrous. Carpel with broad obtuse 
corky ribs: laterals the largest. Stylopodium very short-coni- 
cal. Oil-tubes 2 on the commissure. Seed sulecate beneath each 
oil-tube. 
(E. sarmentosa Presl. DC. Prod. iv, 138 Stems 2-5 feet high, leaves 
ternate and bipinnate; leaflets ovate, acuminate, toothed often lobed at 
base, 6-12 lines long: umbels many-rayed, wlth involucre of few linear 
bracts or none, and involucels of similar more numerous bractlets: rays an 
inch long or less; pedicels short: fruit about 2 lines long, with commis- 
sural face and ribs very corky. In marshes, Alaska to California. 
* * * Fruit flattened laterally. 
+ Prickly, or with tuberculate scales. 
20 ERYNGIUM Tourn. L. Gen. n. 324. 
Glabrous perennials with mostly rigid, coriaceous, spinosely 
toothed or divided leaves and white or blue flowers, in dense ses- 
sile bracteate heads. the outer bracts form the involucre, the 
inner ones, bractless, intermixed with the flowers represent the in- 
volucels. Calyx-lobes very prominent, rigid and _ persistent. 
Fruit ovoid, crowded with hyaline scales or tubercles. Carpel 
with ribs obsolete. Stylopodium wanting: styles short or long, 
often rigid. . Oil-tubes mostly 4 on the back and 2 on the com- 
missure. Seed-face plane. 
E. Vaseyi C. & R. Bot. Gaz. xiii, 142. Stems from a few inches to a 
foot high, several from a common root and branching above: leaves ob- 
lanceolate, unequally spinulose-serrate, attenuate below: involucre of nar- 
row thick and rigid spinose and spiny-toothed bracts, much longer than 
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