Haworthia
(named after A. H. Haworth, a distinguished authority on succulent plants, died 1833). ORD. Liliaceoe. A genus of about sixty species of small, curious-looking and very interesting greenhouse succulent Aloe-like plants, all-with the exception of a single species from Angola-natives of Southern Africa. Flowers small; peduncle naked, simple or branched, loosely racemose; bracts small, persistent. Rosette leaves never pedunculate, short, broad, thick, fleshy. For culture, &c., see Aloe.
H. albicans (whitish). fl. about 1/2in. long; racemes nearly 1ft.; peduncles strong, 1ft., often branched. l. about thirty, dense, deltoid-lanceolate, 2 1/2in. to 3in. long, 1in. to 1 1/2in. broad; face slightly concave; back round, distinctly keeled. 1795. (B. M. 1452, under name of Aloe albicans.) H. arachnoides (cobweb-like). fl. about 1/2in. long; raceme loose, about 1ft.; peduncles simple, nearly or quite 1ft. l. thirty to forty, oblong-lanceolate, 1 1/2in. to 2in. long, scarcely more than 1/2in. broad, pale glaucous-green; back round, one or two-keeled. 1727. (B. M. 756, under name of Aloe arachnoides.) H. atrovirens (dark-green). fl. about 1/2in. long; raceme loose, few-flowered; peduncle simple, slender, about 1ft. l. thirty to forty, dense, oblong-lanceolate, 1/2in. long, about half as much broad, dark green; face swollen; margin armed with small teeth. 1823. (B. M. 1361, under name of Aloe arachnoides pumila.) H. attenuata (attenuated). fl. 3/4in. long; raceme loose, 6in.; peduncles less than 1ft., simple or branched. l. thirty to forty, deltoid-lanceolate, acuminate, 2 1/2in. to 3in. long; face flat, back swollen. Previous to 1790. (B. M. 1345, under name of Aloe Radula.) H. cymbiformis (boat-formed). fl. 3/4in. long; raceme loose, 6in. long; peduncles simple, under 1ft. l. twenty to twenty-five, obovate, acute, 1in. to 1 1/2in. long, 3/4in. broad, pale green; face slightly concave; back keeled upwards. 1795. (B. M. 802.) H. fasciata (banded). fl. 3/4in. long; raceme loose, 6in. long; peduncles nearly 1ft., simple or branched. l. forty to sixty, dense, ascending, deltoid-lanceolate, 1 1/2in. long, 1/2in. wide; face glaucous-green, spotted; back swollen. 1816.
H. margaritifera (pearl-bearing). fl. 1/2in. long; raceme 6in. long; peduncles 1ft. or more in length, branched. l. thirty to forty, dense, ascending, lanceolate-deltoid, 2in. to 3in. long, about 1in. broad at base; face swollen; back round, keeled above; both sides endowed with irregular series of large pearly tubercles. 1739. SYN. Aloe margaritifera.
H. m. granata (grained) is a smaller-growing form, with somewhat different tubercles. (B. M. 1360, under name of Aloe margaritifera minima.) H. Reinwardtii (Reinwardt's). fl. about 1/2in. long; raceme loose, few-flowered, 6in. long; peduncles simple, 6in. long. l. ascending, ovate-lanceolate, 1in. to 1 1/2in. long, 1/2in. broad; face swollen, shining; back round; apex obscurely keeled. 1820.
H. retusa (retuse). fl. 3/4in. long; raceme loose, 6in.; peduncles simple, less than 1ft. long. l. ten to fifteen, patent, oblong, acute, 1in. to 1 1/2in. long, 3/4in. broad; face swollen, bright green; apex cuspidate. 1720. (B. M. 455, under name of Aloe retusa.) H. rigida (rigid). fl. about 1/2in. long; raceme loose, 6in.; peduncle 6in. to 12in., simple or branched. l. ovate-lanceolate, brownish-red, 1in. to 1 1/4in. long, about 1/2in. broad; face concave; back round, with minute tubercles. 1795. (L. B. C. 1430, under name of Aloe expansa.) H. tortuosa (twisted). fl. slightly over 1/2in. long; raceme loose, sub-secund, 6in. to 9in. long; peduncle simple or forked. l. spirally arranged, ovate-lanceolate, all ascending, 1 1/2in. to 2in. long, 3/4in. broad, dark green; face hollowed out; back swollen; apex sub-pungent. 1794. (B. M. 1337, under name of Aloe rigida.) H. viscosa (clammy). fl. 3/4in. long; raceme loose, 6in. to 9in. long, few-flowered; peduncles simple, slender, 6in. long. l. ascending, imbricate, ovate, acute, dark green, 1in. to 1 1/4in. long, 1/2in. broad; face profoundly hollowed out; back swollen. 1727. (B. M. 814, under name of Aloe viscosa.)