This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Annuals or biennials, with ternately or pinnately decompound leaves, and compound umbels of white flowers. Involucre none; involucels of few bracts Calyx-teeth obsolete or minute. Apex of the petals inflexed. Stylopodium depressed. Fruit linear, beaked, laterally compressed, smooth. Carpels nearly terete, ribless except at the beak; oil-tubes none. Seed-face channeled. [Latin; derivation as in the following genus.]
A few species, natives .of warm and temperate regions of the Old World. Type species: Scandix Cerefolium L.
Scandix Cerefolium L Sp. PL 368. 1753. Chaerophyllum sativum Lam. Encycl. 1: 684. 1783. Anthriscus Cerefolium Hoffm. Gen. Umb. 41. 1814.
Annual, glabrous, or finely pubescent above, much branched, 1 1/2°-2° high. Basal and lower leaves slender-petioled, the upper smaller, nearly sessile, all ternately decompound into small segments; umbels numerous, rather short-peduncled, 3-6-rayed, the rays divergent, 1/2'-1 1/2' long in fruit; pedicels stout, 2' - 3" long; bractlets of the involucels linear-lanceolate, acuminate, about 1" long; fruit linear, 3" long, glabrous and ribless, tipped with a ribbed beak of one-third its own length Roadsides and woodlands, Quebec and Pennsylvania, Naturalized from Europe. May-June.
Anthriscus Anthriscus (L.) Karst. (A. vulgaris Pers.) bur-chervil, readily recognized by its short-beaked muri-cate fruit, has been found as a waif in Nova Scotia.