13. ÆTHÙSA, L. Fool's Parsley.
Calyx-teeth obsolete. Fruit ovate-globose, slightly flattened dorsally; carpel with 5 thick sharp ribs; oil-tubes solitary in the intervals, 2 on the commissure.—Poisonous annuals, with 2–3-ternately compound leaves, divisions pinnate, ultimate segments small and many cleft, no involucre, long narrow involucels, and white flowers. (Name from αἴθω, to burn, from the acrid taste.)
Æ. Cynàpium, L. A fetid, poisonous European herb, in cultivated grounds, from N. Eng. and Penn. to Minn. June–Aug.
14. CŒLOPLEÙRUM, Ledeb.
Calyx-teeth obsolete. Fruit globose to oblong, with very prominent nearly equal thick corky ribs (none of them winged); oil-tubes solitary in the intervals and under the ribs, 2 on the commissure. Seed loose in the pericarp.—Stout glabrous (or inflorescence puberulent) sea-coast perennial, with 2–3-ternate leaves on very large inflated petioles, few-leaved deciduous involucre, involucels of numerous small linear-lanceolate bractlets (rarely conspicuous or even leaf-like), and greenish-white flowers in many-rayed umbels. (From κοῖλος, hollow, and πλευρόν, a rib.)
1. C. Gmélini, Ledeb. Stem 1–3° high; leaflets ovate, irregularly cut-serrate (2–2½´ long); fruit 2–3½´´ long. (Archangelica Gmelini, DC.)—Rocky coasts, Mass. to Greenland.
15. CRÁNTZIA, Nutt.
Calyx-teeth small. Fruit globose or slightly flattened laterally; dorsal ribs filiform, the lateral thick and corky; oil-tubes solitary in the intervals, 2 on the commissure.—Small perennials, creeping and rooting in the mud, with hollow cylindrical or awl-shaped nodose petioles in place of leaves, simple few-flowered umbels, and white flowers. (Named for Prof. Henry John Crantz, an Austrian botanist of the 18th century.)
1. C. lineàta, Nutt. Leaves very obtuse, 1–3´ long, 1–2´´ broad; fruit 1´´ long, the thick lateral wings forming a corky margin.—In brackish marshes along the coast, from Mass. to Miss. July. Very widely distributed.
16. FŒNÍCULUM, Adans. Fennel.