STONECROP FAMILY 333 



3. Sedella Congdonii (Eastw.) Britt. & Rose. Congdon's Sedella. Fig. 2178. 



Sedum Congdonii Eastw. Proc. Calif. Acad. III. 1 : 135. pi. 11. 1898. 

 Sedella Congdonii Britt. & Rose, Bull. N.Y. Bot. Gard. 3: 45. 1903. 



Branched from the base with tortuose and diffuse branches, 3-10 cm. high and usually broader 

 than high ; herbage usually decidedly reddish. Leaves opposite or subopposite, obovoid or oblong- 

 ovoid, 4-5 mm. long, branches of the cyme usually spreading and tortuose ; petals bright yellow 

 with a median reddish line, 2 mm. long, radiately spreading in both flower and fruit; styles 

 recurved, 0.5 mm. long; follicles spreading. 



Rocky banks, Upper Sonoran Zone; Sierra Nevada foothills from Eldorado County to Tulare County, 

 California. April-May. 



Congddnia pinetorum (Brandg.') Jepson, Man. Fl. PI. Calif. 450. 1925. (Sedum pinetorum Brandg. Univ. 

 Calif. Pub. Bot. 6: 358. 1916.) Diminutive fleshy herb with slender tuber-bearing rootstocks. Leaves imbri- 

 cated in a compact basal rosette, sessile, ovate, 2-3 mm. long, relatively thin. Flowering stem simple, scapose, 

 2-4 cm. high, leafless or with 1 or 2 bract-like leaves above the middle. Flower solitary, terminal, erect. Calyx 

 5-parted. Petals ovate, 3-4 mm. long, white, spreading, united at base into a short tube. 



This tiny plant was collected in July, 1913, by K. Brandegee "at deserted Pine City above Mammoth, 

 Mono County, California," and has not been rediscovered. The type is in the_ Herbarium of the University of 

 California, but is too fragmentary to furnish satisfactory material for illustration. 



4. DUDLEYA Britt. & Rose, Bull. N.Y. Bot. Gard. 3: 12. 1903. 



Perennial herbs with a short stout, simple or branched caudex, bearing a rosette of 

 fleshy leaves and one or more axillary flowering stems. Leaves of the flowering stems 

 smaller, sessile or clasping, persistent. Inflorescence mostly a cymose panicle. Calyx 

 deeply 5-lobed, the lobes erect. Corolla cream-yellow to red, nearly cylindric, the seg- 

 ments united below the middle, erect or the tips slightly spreading, convolute in the bud. 

 Stamens 10, distinct, included. Carpels erect, many-seeded. [Name in honor of William 

 Russel Dudley, American botanist.] 



A genus of about 30 species, inhabiting western North America, and related to the Mexican genus Echeveria, 

 from which it is distinguished by the convolute corolla-lobes, the persistent basal leaves, and the erect sepals. 

 Type species, Dudleya lanceolata (Nutt.) Britt. & Rose. 



Pedicels very slender, elongated and spreading; stem leaves suborbicular; petals united to near the middle. 



Plants densely pulverulent. 1- D. pulverulenta. 



Plants glabrous or nearly so. 2. D. arisonica. 



Pedicels erect, rather slender or usually stout; stem leaves lanceolate or oblong-lanceolate to ovate, or oblong- 

 obovate. 

 Interior species, or if coastal the corolla not pale yellow. 



Corolla-lobes narrowly lanceolate, very acute or attenuate at apex; pedicels slender, mostly longer than 

 the flowers. 

 Basal leaves mostly spreading and flaccid. 

 Corolla yellow. 



Basal leaves lanceolate or oblong-lanceolate, acuminate or long-acuminate. 



3. D. lax a. 



Basal leaves rhombic-ovate, abruptly acute or short-acuminate. 5. D. nevadensis. 



Corolla orange or red; leaves rhombic-ovate. 



Leaves green or only slightly glaucous; corolla orange more or less tinged with red. 



4. D. Goldmanii. 



Leaves very glaucous: corolla red. 6. D. gigantea. 



Basal leaves narrowly lanceolate, turgid and ascending. 

 Corolla light yellow. 



Corolla reddish, the segments very narrow. 

 Corolla-lobes oblong, merely acute; pedicels mostly stout. 



Leaves 4-10 cm. long; petals 10-14 mm. long, united only at base. 

 Corolla orange and more or less tinged with red. 



Calyx-lobes lanceolate; pedicels mostly longer than the flowers. 

 Calyx-lobes ovate; pedicels mostly shorter than the flowers. 

 Corolla bright yellow or greenish yellow. 



Leaves 2-3 cm. long; petals 7-10 mm. long, united about one-third their length. 



12. D. Abramsix. 



Coastal species with pale yellow flowers. 



Leaves bright green and shining, not at all glaucous, or the young central ones slightly so, ovate. 



13. D. caespitosa. 



Leaves pale green and more or less densely glaucous or mealy. 

 Leaves densely white mealy. 



Basal leaves ovate-lingulate, broadest near the base, 6-7 cm. long; pedicels slender. 



14. D. farinosa. 



Basal leaves broadest above the middle, 6-8 cm. long, pedicels stout. 15. D. Greeneii. 

 Leaves pale green and more or less glaucous, but not mealy. 



Basal leaves lanceolate-acuminate; calyx-lobes ovate-lanceolate. 16. D. candelabrum. 



Basal leaves linear-lingulate; calyx -lobes ovate-triangular. 17. D. Cotyledon. 



1. Dudleya pulverulenta (Nutt.) Britt. & Rose. Chalk Dudleya. Fig. 2179. 



Echeveria pulverulenta Nutt. in Torr. & Gray, Fl. N. Amer. 1: 560. 1840. 

 Echeveria argentea Lemaire, 111. Hortic. 10: Misc. 78. 1863. 

 Cotyledon pulverulenta Brewer & Wats. Bot. Calif. 1: 211. 1876. 

 Dudleya pulverulenta Britt. & Rose, N. Amer. Fl. 22: 35. 1905. 



Rootstock short and thick, whole plants densely mealy-pulverulent throughout. Basal leaves 



