Part 1, 1905] CRASSULACBAE 33 



1. Courantia rosea (lyindl.) lyemaire; Britton & Rose, Bull. 



N. Y. Bot. Gard. 3 : 11. 1903. 



Echeveria rosea Undl. Bot. Reg-. 28 : pi. 22. 1842. 



Cotyledon roseata Baker, in Saund. Ref . Bot. 1 : sub pi. SS, no. 3. 1869. 



Courantia echeverioides I^emaire, Jard. Fleur. 1 : Misc. 92. 1851. 



Caulescent, branching, 10-30 cm. high, glabrous. Leaves numerous, closely set near 

 apex of the branches, oblanceolate-spatulate, sometimes 7.5 cm. long, the margins reddish- 

 tinged ; flowering branches 10 cm. long, stout, densely leafy, the lower leaves spatulate, the 

 upper ones linear, as long as the flowers, all tinged with red ; flowers many, in a dense spike ; 

 calyx-lobes linear, rose-red, the longer ones as long as the corolla; corolla pale-yellow. 



Type locality : Mexico. 



Distribution : San Luis Potosi to Oaxaca and Vera Cruz. 



Illustration : Lindley, loc. cit. 



15. DUDLEYA Britton & Rose, Bull. N. Y. Bot. Gard. 3 : 12. 1903. 



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 flowering branches 

 usually much shorter and relatively broader than the basal ones, sessile or clasping. Calyx: 

 conspicuous, 5-lobed, the lobes erect, linear-lanceolate to ovate, obtuse to acuminate. 

 Corolla nearly cylindric, or somewhat angled, the segments united below the middle, erect, 

 or their tips somewhat spreading, obtuse to acuminate. Stamens twice as many as the 

 calyx-lobes, distinct. Carpels erect, many-seeded. 



Type species, Echeveria lanceolata Nutt. 



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1. Leaves papillose ; corolla coral-red ; cal3^-segments oblong, obtuse. 1. D. Rushyi. z- f/^^^','C £>/^'^-^'-*''^' '^^t* 



2. Leaves not papillose ; corolla yellow to orange or red, rarely white. 



A. Corolla white. 2. D. tilbijiora. 



B. Corolla yellow, orange or red. 



a. Pedicr'^B ^.V^'^rm, spreading; leaves of flowering branches nearly 



orbicular. 

 Calyx-segments triangular-lanceolate. 3. D. pulverulenta. 



Calyx-segments very narrow, linear-lanceolate. 4. D. Anthonyi. 



b. Pedicels stout or slender, not spreading ; leaves of flowering 



branches ovate to linear-lanceolate. 



* Calyx-segments lanceolate to triangular -lanceolate (ovate in no. 14). . 



t Calyx-segments acute to obtuse, not acuminate. <. ^ 



X Corolla dull red to pink. 



Corolla-lobes about as long as the tube. 5. D. tenuis. 



Corolla-lobes twice as long as the tube or more. 



Basal leaves elongated, lanceolate to linear-lanceolate. 

 Pedicels slender ; leaves lanceolate. 



Leaves very glaucous. 6. D. angustiflora. 



Leaves green, shining. 7. D. refiexa. 



Pedicels short or wanting ; leaves narrow. 8. D. Abra'msi. 



Basal leaves short, ovate. 9. D. pumila. 



XX Corolla yellow. 



° Calyx-segments broadly triangular -lanceolate. 

 Pedicels slender ; United States species. 



Leaves of flowering branches deeply sagittate ; basal 



leaves white-farinose. 10. D.farinosa. 



Leaves of flowering branches not sagittate. 



Leaves linear, semiterete. 11. D. alotdes. 



Leaves lanceolate to triangular-lanceolate, flat. 

 Corolla 1 cm. long or less. 



Pedicels as long as the flowers. 12. D. saxosa. 



Pedicels little if any longer than the calyx. 13. D. Setchellii. 

 Corolla 1.5 cm. long. 14. D. grandijiora. 



Pedicels very short, stout. 

 Leaves broadly linear. 



Leaves green, not farinose. 



Corolla-tube shorter than the calyx ; inflores- 

 cence somewhat elongated. 15. D. linearis. 

 Corolla-tube longer than the calyx ; inflores- 

 cence rather compact. 16. D. cultrata. 

 Leaves farinose or glaucous. 



Leaves of flowering stems acuminate ; corolla 



8-10 mm. long. 17. D. Greenei. 



Leaves of flowering stems acute ; corolla 15 



mm. long. 18. D. Hallii. 



Leaves triangular-lanceolate, elongated. 19. D. Candelabrum, 



2 '^t.t-c^ 



