334 UMBELLIFER.E. 



whole. Oalj'x 5-tootlied. Fruit ovate or oblong; carpels semiterete or 

 dorsally flattened; primary ribs filiform and bristly, the secondary more 

 prominent, winged with a row of more or less united barbed prickles. 

 Oil-tubes solitary under the secondary ribs. Seed nearly flat on the face. 



1. D. pusillus, Michx. Fl. i. 164 (1803): D. microphylluH, Presl.; DC. 

 Prodr. iv. 213 (1830). Annual, erect, or the branches short and almost 

 prostrate, % — ^ ^ t- high, retro rsely hispid : leaves bipinnate, the segments 

 pinnatifid, with short narrowly linear lobes: rays 2—6 lines long, nearly 

 equal; involucre bipinnatifid, equalling the umbel; involucels equalling 

 the greenish white flowers: fr. 1)^—2 lines long, short-pedicellate, the 

 prickles usually equalling or exceeding the width of the body: seed 

 slightly concave on the face. — Found in nearly all parts of the State; on 

 bluffs and hills near the sea often depressed and condensed. The herbage 

 has a reputation as an antidote to the poison of rattlesnakes. 



2. D. Oakota, Linn. Sp. PL ii. 242 (1753). Biennial, stout, 2—3 ft. 

 high, hispid: leaves 1 ft. long or less: involucre of many pinnatifid 

 bracts equalling the large umbel; bractlets scarious, with an herbaceous 

 midrib: fl. white, but the central one of each umbellet abortive and dark 

 purple: fr. oblong-ovoid, the spines as long as its diameter: fruiting 

 umbel deeply concave, resembling a bird's nest. — The common Carrol of 

 the gardens; already becoming a wayside weed in middle California. 



29. CAUCALIS, Theophrastus. Genus in nature scarcely distinct 

 from Daacna, but fruit more compressed laterally, and the seed-face 

 deeply channelled. 



1. C. NODOSA, Huds. Fl. Angl. 114 (1798); Linn. Sp. PI. i. 240 (1753), 

 under Tordi/lium; Gsertn. Fr. et Sem. i. 82. t. 20 (1788), under Torilis. 

 Branching at base, the long branches reclining, leafy throughout and 

 retrorsely hispid: leaves pinnate, with pinnatifid divisions: umbels 

 small, naked, subsessile opposite the leaves: carpels unequal, the larger 

 one a line long; surface tuberculate and prickly, the prickles barbed or 

 incurved at summit. — An obscure weed, common in many parts of the 

 State; native of Europe. 



2. C. iiiicrocarpa, H. & A. Bot. Beech. 348 (1840). Erect, slender, 

 6 — 15 in. high, nearly glabrous: leaves much dissected, hispidulous: 

 umbels terminal and at the ends of the branches, subtended by two or 

 more foliaceous dissected bracts, 3 — 6-rayed; rays slender, 1 — 3 in. long; 

 umbellets few-flowered, the pedicels unequal; involucels of short entire 

 bractlets: fr. oblong-ovoid, 2 lines long, armed with uncinate prickles. — 

 Very common, but slender and obscure. Like Daucus pusillus it is 

 regarded as efficacious against the venom of the rattlesnake. 



