46 NORTH AMERICAN FLORA [Volume 22 



56. Dudleya humilis Rose, Bull. N. Y. Bot. Gard. 3 : 27. 1903. 



Cespitose, clinging to the rocks, sometimes a dozen or more rosettes of leaves crowning 

 the rootstock. Leaves linear-ovate, somewhat narrowed below, acute or shortly acuminate, 

 3-4 cm. long, 10-15 mm. broad, very glaucous ; flowering branches 2-4 cm. long, their lower 

 leaves lanceolate, somewhat clasping; inflorescence a short panicle, few to very many- 

 flowered ; pedicels short, 2-5 mm. long ; calyx-lobes ovate, acute ; corolla at first pale- 

 yellow but drying reddish, 7-8 mm. long, its segments acute, somewhat spreading at tip, 

 about twice as long as the calyx. 



Type locality : Mount Diablo, California. 

 Distribution : Known only from the type locality. 



57. Dudleya caespitosa (Haw.) Britton & Rose, Bull. N. Y. 



Bot. Gard. 3 : 27. 1903. 



Cotyledon caespitosa Haw. Misc. Nat. 180. 1803. 



Cotyledon hngui/ormis R. Br. in Ait. Hort. Kew. ed. 3. 2 : 109. 1811. 

 Cotyledon reflexa Willd. Enum. Hort. Berol. Suppl. 24. 1813. 

 Echeveria caespitosa DC. Prodr. 3 : 401. 1828. 



Acaulescent, green or somewhat glaucous. Basal leaves ovate to ovate-oblong or 

 oblong-lanceolate, the outer 2.5-7 cm. long, 1.5-2 cm. wide; scapes rather slender, 3 dm, 

 high or less, their leaves triangular-ovate, acute, small ; cyme more or less compound, 

 dense, 8 cm. wide or less ; pedicels stout, shorter than the flowers, 2-5 mm. long ; corolla 



yellow, 12-15 mm. long ; calyx- segments ovate, acute ; carpels about 6 mm. long. 



Type locality : California. Krroneously cited in original description as from Cape of Good 

 Hope. 



Distribution : Central and northern California. 

 Illustration: DC. Hort. Gene v. ^/. 14. 



58. Dudleya Helleri Rose, Bull. N. Y. Bot. Gard. 3 : 27. 1903. 



Caudex crowned by several (8 in specimens seen) small dense rosettes of leaves. Basal 

 leaves linear to ovate-linear, 3-4 cm. long, very glaucous, thickish, acute, 15 mm. wide at 

 the base, 10 mm. wide or less just above the base; flowering branches slender, 10-15 

 cm. long, bright-red, usually naked below (at least for 2-6 cm.), their leaves ovate, the 

 upper ones short and acute ; inflorescence a rather small flat-topped cyme of 2-5 branches, 

 each branch bearing 3-6 flowers ; pedicels short, 2-5 mm. long ; calyx-lobes ovate, acute ; 

 corolla deep-yellow, less than 10 mm. long, the lobes united at base into a very short tube, 

 broadly ovate, acute ; stamens a little shorter than the corolla-lobes, attached almost at the 

 base of the corolla. 



Type locality : Monterey County, California, 

 Distribution : Type locality and vicinity. 



59. Dudleya Cotyledon (Jacq.) Britton & Rose, Bull. N. Y. 



Bot. Gard. 3 : 28. 1903. 



Sedum Cotyledon Jacq. f. Eclog. 1 : 27. 1811. 



Cotyledon caUfornica Baker, in Saund. Ref. Bot. 1 : pi, 70. 1869. 



Echeveria caUfornica Baker, loc. cit. as syn. 1869. 



Acaulescent, or very nearly so, tinged with red. Basal leaves numerous, linear-lingu- 

 late, pale-green, slightly glaucous, 6-10 cm. long, 2 cm. wide or less, sharply acuminate, 

 the base widened ; flowering branches stout, 4-5 dm. long, erect-ascending, glaucous, their 

 leaves numerous, ovate to triangular-ovate, sagittate, half-clasping, acute, the lower ones 

 about 2 cm. long, the upper gradually smaller, the similar bracts of the inflorescence 5 

 mm. long or less; inflorescence cymose-paniculate, 2.5 dm. long or less; pedicels stout, 

 4-10 mm. long ; calyx white- farinose, its lobes triangular-ovate, acute, 3 mm. long ; corolla 

 yellow, 1 cm. long, its tube slightly shorter than the calyix, its oblong-lanceolate segments 

 acute, slightly keeled. 



Type locality : Monterey, California. 



Distribution : Known only from the type locality and vicinity. 



Illustrations : Jacq. loc. cit. pi. 17 ; Baker, loc. dt^ 



