PENTAXDRIA. DIGTNIA. 179 



central, sessile; involucell multipartite. Styles filiform, 

 simple. Leaves digitate. (Character taken from .S". ?nan- 

 landica; in S. Emopcea, the central flowers are masculine.) 



Species. 1. S. marylandica. 2. canadensis. Both spe- 

 cies grow in the vicinity of Thiladclphia. 



Of this genus there are but 2 other species at present 

 enumerated by Persoon; viz. S. curopaa, and S. crith- 

 mifolia, of Russia. 



259. DAUCUS. L, (Carrot.) 



Fruit oblong, partly solid, ribs ciliated with 

 hispid hairs or barbed bristles. Imxilucrnm^m- 

 natifid. 



Umbell many-rayed, while in flower flat, in fruit partly 

 contracted into the form of a funnel. Petals cordately in- 

 flected; 5 primary ridges of the seed scarcely prominent, 

 nearly smooth; 4 secondary muricate. 



Species. 1. D. carota. Commonly naturalized. 2. 

 pusilhis. Probably only a variety of I), carota. 



The genus Daucus, now- containing 15 or 16 species, ex- 

 ists exclusively in Barbary and the south of Europe, ex- 

 cepting I), copticiis of Eg3pt. 



^60. AMMI. L, (Bishop's-weed.) 



Flowers radiated, all hermaphrodite. Petals 

 cordately inflected. «< Fruit oblong, corticate, 

 angular, ridges 5, obtuse, intervals convex." 

 SPRENGEL.f Involucrum pinnatifid. 



Somewhat allied to Tiaricus in habit; umbell loose, sub- 

 divaricate. 



Species. 1. A.? eapillacev?7i. Q .\ bout 1 foot high. 

 Leaves almost capdiary divided, smooth, bipinnatifld, pin- 

 nut?e trifid or unequally bifid; peduncle of the umbell 4 

 to 8 inches long, anguiar]5' grooved. Umbell spreading, 

 unequal, 4, 6, or 8-rayed. Involucrum about 3-leaved, 

 leaves simple or trifid. Umbellet about 4, 6, or 8-flovver- 

 ed, central peduncles as well as pedicells being the shor- 

 test, Involucell consisting mostly of one trifid leat. Calix 

 minute, 5-toothed. Petals oval, entire, with the points in- 

 flected, white. Style very minute, with the base elevated. 

 Fruit partly globose and solid, somewhat ovate, or pointed 

 above, smooth. Seed roundish-ovate, membranaceously 



\ Plantarum umbelliferarum denuo disponendarum Prodro- 

 mus, auctore Curtio Sprengel, &c. 1813. 



