PLANTS COLLECTED BY DR. GAMBEL. 151 



From any affinity yet discoverable, this curious plant way well form a sub order 

 CRossosoMEiE, with the sestivation of the coralline calyx imbricate, its base 

 occupied by a fleshy disk. Stamina indefinite. Ovaries three to five, verticillate, 

 cohering at the base into a common stipe ; ovules very numerous, pendulous. 

 Capsular follicles tardily dehiscent, many-seeded ; the hylum surrounded by a large 

 fringed arillus. 



Hab. Abundant on the borders of streams in the island of Catalina, off the coast 

 of Upper California. Flowering in February. 



TRIFOLIUM. 



T. §. *Physantha. {Involucrarium.) With the calyx 5-cleft, one or two of the 

 divisions smaller. Corolla marcescent. The vexillum transformed into a physiform 

 sac, which at length envelopes the very small wings and monopetalous carina. 

 Stigma capitate. Legume stipitate, two to five-seeded, included in the calyx. 



T. *STENOPHYLLUM. Annual, branching from the base; leaves ternate, smooth and linear, distantly serrulate; 

 stipules subulate, sparingly denticulate ; peduncles elongated, filiform. Heads small and nearly round, 

 the vexillum, at length, forming a membranous inflated sac of equal breadth throughout, embracing the 

 small vi'ings and small carina, which is monopetalous, with but one broad claw attached to the 

 vexillum. 



With all the aspect of the involucrate clovers. Flowers brownish, the keel deeper 

 coloured. Stamens diadelphous. Pod stipitate, flat, two-seeded, seeds obcordate. 

 Stigma small, capitate. About four to six inches high : leaves about one or two lines 

 wide. 



Hab. The island of Santa Catalina, and San Pedro, Upper California. Flowering 

 in February. 



T. *GAMBELii. Perennial and decumbent, smooth, branching from the base; leaflets roundish-oval or 

 cuneate-oval, obtuse, very minutely and sharply serrulate ; stipules membranaceous, dilated, entire, 

 with subulate, slender points ; peduncles about the length of the leaves ; involucrum about 8-cleft, the 

 segments lanceolate, acuminate ; teeth of the calyx trifid, or simple, with setaceous points ; legume 

 stipitate, three to five seeded ; wings longer than the vexillum. 



A large, robust species, with shortish branches, very large stipules, and heads of 

 large flowers, which appear to have been whitish, with purple tips to the carina ; 

 heads of flowers one to one and a half inches across ; the vexillum very wide below ; 

 so as to conceal the other petals ; the wings and carina are also united ; leaflets three 

 quarters of an inch long, and about the same breadth. 



Hab. Island of Catalina, St. Simeon, and Pueblo de los Angeles. 



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