Cotyledon.'] LIII. CEASSULACE^. (C. B. Clarke.) ' 417 



SIKKIM HIMALAYA, alt. 10,000-12,000 ft., J. D. H. 



Stems 3-6 in. high, throwing decumbent stolons from the base. Cauline leaves 

 % in. long, sessile. Petals united at base only. Stamens 5. Flowers sometimes 

 4-merous. Seeds ellipsoid, smooth, tailed. 



6. SEiDUlVI, Linn. 



Succulent herbs. Leaves alternate or rosulate, rarely opposite ; entire or 

 laciniate. Flowers cymose, hermaphrodite, or unisexual by abortion. Calyx 

 5-4-partite. Petals -4, free. Stamens 10-8, the alternate ones adnate to the 

 petals. Hypogynous scales quadrate or cuneate, entire or emarginate. Carpels 

 5-4, free or slightly united at base, narrowed into the styles ; ovules very numer- 

 ous. Follicles 5^4, many-seeded. DISTKIB. Species 130 ; mostly in the cold 

 and temperate regions of the northern hemisphere ; one species is found in 

 Abyssinia and one in Peru. 



SECT. I. Rhodiola. Rootstock perennial, thick, suberect, with a crown 

 of scales from the axils of which rise the simple leafy annual stems carrying 

 terminal cymes. Flowers dioecious or polygamous, often 4-nierous. Petals in 

 the males often much exceeding the sepals ; in the females shorter or narrower. 

 Styles usually short, recurved in fruit. Seeds oblong-ellipsoid, compressed, 

 testa loose produced beyond the end of the nucleus, often as a bent short tail. 



* Cymes dense, not carrying bracts on the short branches (though there are 

 frequently bracts at the base of the outer branches). 



1. S. Rhodiola, DC. Prodr. iii. 401 ; leaves obovate or broadly oblong 

 often toothed towards the apex, petals yellow, hypogynous scales in the 

 males oblong emarginate. Ledeb. Fl. Ross. ii. 179 ; H. f. 8f T. in Journ. Linn, 

 Soc. ii. 95. S. imbricatum, H. f. fy T. in Journ. Linn. Soc. ii. 101. Rhodiola 

 imbricata, Edgw. in Trans. Linn. Soc. xx. 47. R. rosea, Linn. ; Engl. Sot. t. 

 508. 



ALPINE WESTERN HIMALAYA ; from KTJMAON to KASHMIR, alt. 12,000-17,000 ft.; 

 frequent. DISTRIB. The arctic and alpine regions of America, Europe and Asia. 



Very glaucous. Hootstock having an odour of roses. Stems 3-15 in., thick. 

 Leaves -l in. long, imbricated (often very closely) from a narrow or broad base. 

 Cyme densely congested. Sepals narrow oblong. Stamens long, exsert. Carpels in 

 fruit | in. long, not narrowed gradually at the base. The examples of S. imbricatum 

 have dioecious (or functionally dioecious) heads ; and the carpels have short recurved 

 styles, altogether as in Sect. Rhodiola. 



2. S. heterodontum, H. f. fy T. in Journ. Linn. Soc. ii. 95; leaves 

 ovate incise-dentate from a broad or cordate or auriculate base prominently white- 

 margined, flowers rose-coloured ? (ex H. f. & T.). S. serratum, Jacquem. 

 Journ. 



TEMPERATE and ALPINE WESTERN HIMALAYA, alt. 8000-14,000 ft.; Kashmir, 

 Jacquemont-, Kunawur, T. Thomson-, Mandala, Cleghorn. 



Stems 12-18 in. Leaves loosely imbricate. Cyme very dense, especially in fruit. 

 Otherwise agrees closely with S. Bhodiola, of which H. f. & T. suggest it may be a 

 variety. 



3. S. crenulatum, H.f. fy T. in Journ. Linn. Soc. ii. 96 ; leaves ellip- 

 tic or broad oblong sessile crenulated, cymes sessile enclosed by the upper leaves 

 and outer leaf-like bracts, sepals purple narrow-oblong, petals rose-coloured. ^ 



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