186 Crassulaceae 



leaves very glaucous, linear, not tapering, except toward the 

 apex, 10 cm. long or less, 1 cm. wide or less, somewhat flattened 

 below, terete above, flowering stems weak, their primary branches 

 1-2-dichotomous, the ultimate branches slender and many- 

 flowered ; calyx widely spreading in age. 



Described from specimens collected on Catalina Island by Dr. Hasse. 



3. S. densiflorum Rose. Glaucous throughout from more or 

 less branching rootstocks ; leaves numerous, erect, nearly terete, 

 acute, 6-12 cm. long; flowering branches slender and weak; 

 inflorescence a rather dense compact cyme, its ultimate branches 

 rather short, 4-8-flowered; pedicels short, 1-3 mm. long; calyx 

 2 mm. long, its lobes twice as long as its tube, broadly ovate to 

 orbicular, obtuse; corolla white or pinkish, 6 mm. long, its seg- 

 ments spreading, distinct nearly to the base. (Cotyledon nudi- 

 caule Abrams.) 



Frequent on rocky cliffs in the San Gabriel Canyon. 



4. DUDLEYA Britton & Rose. 



Caulescent or acaulescent perennials with flat linear 

 to ovate basal leaves and yellow, orange, red or rarely 

 white flowers, mostly in panicles. Leaves of the flower- 

 ing branches usually much shorter and relatively broader 

 than the basal ones, sessile or clasping. Calyx conspicu- 

 ous, 5-lobed, the lobes erect, linear-lanceolate to ovate, 

 obtuse to acuminate. Corolla nearly cylindric, or some- 

 what angled, the segments united below the middle, 

 erect, or their tips somewhat spreading, obtuse to acumi- 

 nate. Stamens twice as many as the calyx-lobes, dis- 

 tinct. Carpels erect, many-seeded. (Cotyledon in part.) 



* Leaves spatulate to ovate, rather thin. 



1. D. pulverulenta (Nutt.) B. & R. Densely white-mealy 

 throughout ; caudex short and very stout ; rosulate leaves rather 

 thin and flaccid, in a flattened large rosette, broadly spatulate, 

 abruptly acute, 5-10 cm. long; scapes 4 dm. high or more, stout 

 with broadly cordate rather numerous acute leaves, the lower 

 sometimes ovate, acuminate; inflorescence of 2-6 elongated simple 

 racemes; pedicels mostly horizontal, slender, 6-15 mm. long; 



