330 CALIFORNIA.— SUPPLEMENT. ILeguminosa. 



i. Medicago maculata. Sibth. 

 Probably imported. 



1. Trifolium Macrcei. Hook, et Am. in Bot. Misc. 3. p. 179. — T. albo-purpureum. 

 Torr. et Gr.-Fl. I. p. 313. 



These specimens exactly agree with those of Chili. The flowers are small, a little protruded beyond the 

 silky calyces, dark purple, pale at the tips. It is a small slender spreading plant. Stems a span long. 

 Stipules often ovate. 



2. T. dichotomum ; erectumdichotomumpatenti-pilosum,foliisanguste obovatis denti- 

 culatis, stipulis folioli dimidium sequantibus lato-ovatis acuminatis, capitulis lato-ovatis 

 obtusis longe pedunculatis, calycibus sessilibus dense piloso-sericeis dentibus longis 

 setaceis rectis subaequalibus corollae longitudine. 



In many particulars this agrees with the preceding species, but it is, in every respect, a much larger and 

 stouter plant, apparently growing quite erect. The stipules are J to f of an inch in length, the capitula more 

 than an inch. The calyx is quite as long, or rather longer than the corollas, which latter appear to be of a 

 purple colour. 



3. T . gracilentum ; annuum glabrum, caulibus erectis gracilibus, foliolis obcordato- 

 cuneatis serratis serraturis aristatis, stipulis e lata basi lanceolato-acuminatis integerrimis, 

 pedunculis elongatis, floribus umbellatis demum deflexis, calycis glaberrimi striati denti- 

 bus subulatis tubo longioribus corolla brevioribus inferiore reliquis sub $ breviore, legu- 

 mirte dispermo stipitato. — Torr. et Gr. Fl. \.p. 316. 



A slender, erect, annual plant, glabrous in every part. Corollas purple, apparently persistent, and be- 

 coming scariose. 



4. T. (Involucraria) microcephalum. Ph. — Hook. FL Bor. Am. I. p. 133. Torr. et Gr. 

 Fl. 1. />. 317. 



5. T. (Involucraria) amplectens ; parvum erectum glabrum, foliolis cuneatis dentatis, 

 stipulis ovatis membranaceis cuspidatis, pedunculis axillaribus folium asquantibus, capitulo 

 3-5-floro, involucro profunde 3-5-fido membranaceo lobis rotundatis membranaceis sub- 

 incisis, calycis rigidi tubo brevissimo dentibus subulato-setaceis corollam floriferam parum 

 brevioribus nunc bifidis, vexillo demum maximo inflato membranaceo, legumine oblongo 

 transversim rugoso 4-spermo vexilli longitudine. (Tab. LXXVIII. — ) Torr. et Gr. Fl. 1. 

 p. 319. 



In size and general aspect this Trefoil accords with T. depauperatum, but there the involucre is obsolete 

 and truncate, here (comparatively) large and deeply lobed. 



Tab. LXXVIII. Fig. 1. Capitulum of flowers ; fig. 2. Single flower; fig. 3. Capitulum of three fruits, 

 with the persistent corollas : — magnified. 



6. T. (Involucraria) microdon; glabrum subdecumbens ramosum, foliolis obcordatis 

 acute serratis, stipulis ovatis acuminatis integerrimis, involucris hemisphaericis multifidis 

 nervosis capitulo denso parum brevioribus laciniis 3-5-fidis spinuloso-serratis, calycis 



