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deeply 5-lobecl. Fruit a berry. Seeds large, 

 globose. — U' Root large; stem climbing by 

 tendrils. Flowers greenish white. 



1. M. FABACEA Naud. {Calif ornica Torr.) 

 Ovary globose, densely echinate; fruit globose, 

 covered with pungent spines; seeds globose. — 

 San Francisco. Spring. 



2. M. MARAH Kellogg. Ovary ovate, cov- 

 ered with soft spines; fruit ovate, muricate; 

 seeds lenticular. — San Francisco. Spring. 



The enormous rhizomes of both species 

 abound in an acrid, drastic juice, which renders 

 the fecula, contained in a fair proportion, poi- 

 sonous. 



Order 2. RUBIALES. Filaments terete. 



Family 1. DIPSACEiE. 

 Leaves opposite. Stipules 0. Flowers in 

 involucrate heads; single flowers j)rotected by 

 a double (involucellate) calyx, tetrandrous. 

 Ovary 1-celled, 1-ovulate.- Fruit utricular. 



1. Dipsacus Touru. Teasel. 



Head oblong. Leaflets of the involucre radi- 

 ate. External calyx (involucellum) quadran- 

 gular; internal cyathiform. — 0. Spring. 



1. D. FULLONUM L. Flowers pale. — Culti- 

 vated grounds. Summer. Escaped from cul- 

 tivation, Originally Mediterranean, 



