UMBELLIFERAE 105 



CANADIAN CRYPTOTAENIA. Hone- wort. 



Stem about 2 feet high, rather slender, branched above. Leaflets 2 to 4 inches 

 long, serrate to the very petiole. Umbds terminal and subterminal, somewhat in 

 pairs. Carpels with linear flattish ribs; channel* dark brown; vittae visible only 

 in a transverse section of the carpels. 

 Hab. Woods, and shaded places : frequent. Fl. June. Fr. Aug. 



Obs. This is a Comparatively harmless native weed, frequent in 

 shaded places about dwellings: But, there is a foreigner, with some- 

 thing of its general habit and aspect (viz. Aegopbdium Podagrtiria, 

 L.), which has been introduced into some lots and gardens, in Ger- 

 mantown, near Philadelphia, and proves to be a nuisance, not easily 

 abated. It has hitherto resisted all attempts to get rid of it ; and 

 Sir J. E. SMITH, in his Flora Britannica, says of it "radix rcpcns. 

 vix exstirpanda." In DON'S General System of Gardening and Botany, 

 it is also remarked pf the Aegopodium, that "being a great creeper, 

 it cannot be admitted into gardens, for after it gets hold it is next 

 to impossible to eradicate it again." P. COLLINSON, writing to 

 JOHN BARTRAM, says, "it is a notorious running weed in the gar- 

 den." A plant of such character (and worthless beside,) deserves 

 to be studied, and watched that it may be avoided. 



162. A'PIIJM, L. 



[From the Celtic, Apon, water; near which it naturally grows.] 

 Fruit orbicular ; stylopodium (base of the styles) depressed ; carpels 

 with 6 filiform equal ribs ; carpophore (central axis of the fruit) un- 

 divided ; vittae single, or 2 or 3 in the outer channels. Leaves pin- 

 nately dissected; involucre and involucels none; flowers greenish- 

 white. 



1. A. GRAVEOLENS, L. var. puLCE, DC. Lower leaves on long stout 

 petioles ; segments cuneate, lobed. 

 STRONG-SCENTED APIUM. Celery. 



Biennial; smooth. Stem 2 to 3 feet high, branching. Radical leaves on stout 

 channelled petioles 6 to 12 inches, or more, in length ; stem-leaves on short petioles. 

 Umbels terminal and axillary, the axillary ones subsessile. 

 Hab. Gardens, Ac. Nat. of Europe. Fl. July. Fr. Sept. 



Obs. The petioles, when blanched, become succulent and tender ; 

 and are a favorite salad. The var. RAPACEUM, DC. or Turnep-rooted 

 Celery, is also cultivated by amateurs. 



163. PETROSEMWITM, Hoffm. 



[Gr. Petra, rock, and Selinum, Rock Selinum; from its native habitat.] 

 Fruit ovate ; stylopodium conical, short ; carpels with 5 equal ribs ; 

 carpophore 2-parted ; channels with single vittae. Leaves decompound ; 

 involucre few-leaved ; involucels many-leaved ; flowers greenish- white. 



1. P. SATIVUM, Hoffm. Lower leaflets cuneate-ovate, trifid and in- 

 cised-dentate, upper ones linear-lanceolate and nearly entire; 

 involucels subulate-filiform. 

 CULTIVATED PETROSELINUM. Parsley. 



Biennial; smooth. Stem 2 to 4 feet high, streaked with green and yellow, 

 branched. Leaves shining green, the lower ones much dissected. Umbels pedun- 

 culate; involucre, often of a single linear leaf. 



