MESEMBRYANTHEMUM 



A. Epapulosa: Plant not bearing glillerimj papiUie or 



projections (species 1-23). 



E. Plant stemless or nearly so. 



c. Lvs. 4-6, semi-terete at the base, thickening and 



triquetrous at the apex. 



1. tigrlnum, Haw. Tiger's Jaw. Stemless or essen- 

 tially so: lvs. cordate-ovate, 2 in. or less long, glaucous 

 green and marbled with white, the upturning edges 

 with long, soft, ciliated teeth, the keel entire: fls. 

 nearly sessile, large, yellow. B.R. 3:260. 



2. felinum, Haw. Fig. 1395. Lvs. triquetrous, rhom- 

 boid-lanceolate, 2 in. or less long, but narrower than in 

 the last, somewhat glaucous, faintly dotted with white, 

 the edges with 8 ciliate teeth; keel entire: fls. nearly 

 sessile, yellow. 



cc, Lvs. 4-6, triquetrous, thickened from the base to the 

 middle, but tapering to the apex. 



3. albin4tum, Haw. Stemless: lvs. curved-triquet- 

 rous upwards, with a recurved mucro or spine at the 

 apex, bearing elevated whitish dots: fls. sessile, yellow, 

 ccc. I.ns. half-cylinarical, of various sizes or forms on 



the same plant, in alternate pairs. 



4. angustum. Haw. Nearly or quite stemless, small: 

 lvs. 2-ranked, linear, tongue-shaped, long, keeled at the 

 apex, somewhat unequal, one of them straight-acute 

 and the other hooked: fls. nearly sessile, yellow. 



cccc. l/vs. tongue-shaped, with one margin thicker 



than the other, of two or more forms, S'-ranked. 



D. Peduncle hss lh„„ 1 hi. h„\g. 



5. linguaefdrme. Haw. Lv^. nuiiiiKiHy tongue-shaped, 

 deflexed and somewhat falcatr, tn ci.nung depressed 

 when old, flattish above. obliquL-ly attuiiuate : fls. yellow. 

 Index Kewensis makes the M. lingufrforme of Haworth 

 synonymous with 31. obliquum, Willd., and uses Lin- 

 nsBUs' M. linguiforme as a tenable name. 



DD. Peduncle 1 in. or more long. 



6. cultT&tum, Salm-Dyck. Lvs. 2-ranked, thick, 

 tongue-shaped and curved like a pruning-knife, blunt 

 at the apex: fls. yellow, on a somewhat 3-angled pe- 



7. depr^ssum, Haw. Prostrate: lvs. narrow, tongue- 

 shaped, recurved-depressed, acute: fls. yellow, with 

 petals somewhat recurved. 



8. pnstul&tnim, Haw. Lvs. 2-ranked, narrow, tongue- 

 shaped, long and ascending, blunt, bearing pustules near 

 the base: fls. yellow. 



BB. Plant with an evident erect or prostrate stem. 

 C. Foliage lvs. distinct or essentialltj so {not truly per- 



D. Stem or caudex prostrate. 

 E. Peduncle with 2 bracts. 



9. triooldrtim. Haw. (Jf. tricolor, Hort.). Stem 1ft. 

 long : lvs. cylindrical, acute, green, 2-3 in. long, 

 minutely punctate: fls. yellow, blood -colored inside, the 

 petals acute, the anthers brown. Gn. 24, p. 89. — There 

 is a white-fld. form. 



10. acinaciffirme, Linn. Stem articulate, 2-3 ft. long, 

 the young growth compi-essed : lvs. opposite, 2-3 in. 

 long, simitar-shaped (curved and thicker on one edge), 

 the keel dilated: fls. purple, about 4 in. across, "the lar- 

 gest in the genus," the stigmas 14: fr. size of a goose- 

 berry, and eaten by Hottentots. — Handsome. 



11. Tubrocinctum, Haw., is probably a form of the 

 last, differing in having a red line on the keels of the 

 lvs. B.R. 20:1732. 



12. SEquilaterile, Haw. Differs from M. acinnciforme 

 chiefly in thinner lvs. and smaller fls.: fls.. fragrant, 

 1% in. across. Native to Australia, Tasmania, Chile and 

 S. Calif. 



EE. Peduncle without bracts. 



13. Mule, Linn. Stem angular: lvs. opposite, 3-4 in. 

 long, triquetrous, curved, the keel serrate: fls. large, 

 yellow or purple, the stamens 8: fr. edible, being one of 

 the Hottentot Figs. Grows well on the sea cliffs in S. 

 England, making long, hanging masses (Gn. 55, p. 235, 

 with picture). 



C4 



MESEMBRYAXTHEMUJI 



1007 



«tly 



DD. Stem, or at least the branches, erect or prom 

 ascending. 

 E. Pis. yellow, orange or copper-color. 

 14. aurantiacum, Haw. Stpm hofoming 1 ft. or more 



hii.'li, luurh l.i'an.'lii (1. ^,,111,11 in,-, ,1,-,-unibent at base, the 



siiKii.ih iii.l -!,i:i...M., i.i.iii'i., ! ' .[ii.-trous: fls. orange, 



].". ailreum, Linn. Larger: lvs. 1J4-2 in. long, cylin- 

 drically triquetrous, smooth and glaucous, mucronate: 

 fls. golden, 2 in. across, the petals in many series. B.M. 

 2152. — In this and the last, the lower lvs. are often nearly 

 connate at the base. 



EE. Pis. rose-color or purplish. 



F. Petals of two unlike kinds,— subulate and linear- 

 lanceolate. 



10. mutibile. Haw. With straw-color or reddish 

 tortuous, erect liranches: lvs. about J^ in. long, com- 

 pressed-triquetrous, incurved, the keel entire, apex 

 acute: fls. mostly solitary on an upwardly thickened pe- 

 duncle, rose-color, the inner short petals pale yellow 



1395 Mesembryanthemum felmum (XK) 



17 inclaMens, Haw Distmguished from the last by 

 scimitar shaped hs and bioader pet iN lvs crowded, 

 green, compressed-triquetrous and scimitar-shaped 

 (thicker on one edge). 



FF. Petals of one kind. 



18. bUndum, Haw. Twoft., with numerous branches: 

 lvs. distant, 2 in. or less long, compressed-triquetrous, 

 but with equal sides, narrow, minutely dotted, acutish: 

 fls. 2 in. .across, pale rose, the petals toothed. B.R. 

 7:582. L.B.C. 6:599. 



19. spectihile, Haw. Stem prostrate, but branches 

 ascending : lvs. 2-3 in. long, crowded, glaucous, in- 

 curved and spreading, triquetrous, attenuate and mu- 

 cronate: fls. purplish; petals 1 in. long, the inner some- 

 what shorter. B.M. 396. 



20. mnric4tum. Haw. Stem suberect: plant bluish: 

 lvs. less than % in. long, somewhat incurved, deltoid 

 and toothed, very glaucous: fls. small and fragrant, the 

 petals acute. 



CC. Foliage lvs. truly connate or perfoliate. 

 D. Zivs. triquetrous. 



21. geminitum. Haw. Dwarf: stem subshrubby, the 

 branches procumbent: lvs. erect, glaucous white, the 

 cartilaginous margins entire: fls. white (?). 



22. acuWngulum, Haw. Stem shrubby, with rigid and 

 erect branches : lvs. sheathing, ^4 in. long and about as 

 long as the internodes, glaucous green, triquetrous, 

 compressed near the apex, somewhat incurved: fls. 

 white, small, in a panicle. 



DD. Lvs. elongated, subulate or someivhat cylindrical. 



23. stipul4ceum, Linn. Dwarf, with erect, decussate 

 branches: lvs. 1^2-2 in. long, very slender, crowded, 

 spreading and recurved, very glaucous: fls. in the axils, 

 mostly solitary, purplish. 



