HAWORTHIA 



HECHTIA 



715 



9. margaritifera, Haw. (H. major, Duval. Aide mar- 

 aritifera , Burm. ) . Lvs. turgid, spreading, merely acute, 

 oth faces with scattered coarse white tubercles, which 

 ften turn green on the upper surface. P.G. 57. Varies 

 ito several named forms. 



DD. The Ivs. less conspicuously white -tub ercul ate. 



10. rugdsa, Bak.( Aloe rugdsa, Salm-Dyck. H. Rddula 

 sperior). Lvs. long attenuate, spi-eading, plano-convex, 



loth faces with irregularly placed, rather coarse green- 

 5h tubercles. 



1022. Haworthia Reinwardtii. 



11. subulata, Bak. (Aloe siibulata, Salm-Dyck). Like 

 he preceding, but the scattered or rugosely confluent 

 ubercles very small, whitish. 



12. Radula, Haw. (Aide Rddula, Jacq. Aplcra Rd- 

 'ula, Willd.). Lvs. shorter, the white tubercles finer. 



Hape. 



l.'i. hybrida, Haw. Lvs. short, more turgid, the upper 

 ace somewhat rugose, the lower with scattered green 

 ubercles. ("ape? 



C, Shape of li-s. ovate to deltoid, succulent, not tuber- 

 en hit c, spreading, the rosette often somewhat 

 elongated. 



' 14. tessellata, Haw. (Aide tesselldta, Schult.f.). Lvs. 

 .cute or acuminate, setosely denticulate, scabrous be- 

 teath, the smooth upper surface with pale lines anas- 

 omosing in squares. 



15. recurva, Haw. (Aide recurva, Haw. Aplcra re- 

 ilri'd , Willd. ) , Lvs. entire, scabrous beneath, the smooth 

 ;ipper surface longitudinally pale striate. B.M. 1353. 



1C. cymbiformis, Haw. (H. concava, Haw. Aloe cymbi- 

 ormix. H:iw. A. cymbo? folia, Schrad. Aplcra cymbce- 

 dlifi, Willd. ). Lvs. entire, smooth, rather obtuse, longi- 

 .udinally striate. B.M. 802. 



ccc. Shape of Ivs. cuneately prismatic, pellucid. 



>. The Irs. erect, obliquely truncate, with deltoid, pale- 



striate apex. 



17. mirabilis, Haw. (Aloe mirdbilis, Haw. Aplcra 

 nirdbilis, Willd.). Lvs. ciliate-denticulate on margin 

 ind keel, sparingly tuberculate beneath. B.M. 1354. 



18. asperula, Haw. (Aloe asperula, Schult. f.). Lvs. 

 intire, finely scabrous. 



T 19. retusa, Haw. (Aloe retusa, Linn. Aplcra retusa, 

 tVilM. Catevala retusa, Medic.). Lvs. entire, smooth. 

 3M. 455. 



DD. The Ivs. erecto-spreading, pointed, smooth. 



20. cuspidata, Haw. (Aide cuspidata, Schult. f.). Lvs. 

 stout, rather concave, entire, nearly erect, the setulose 

 apex obscurely longitudinally or reticulately striate and 

 sometimes truncate, but very obliquely so. 



21. turgida. Haw. (Aide turgida, Schult. f.). Lvs. 

 small, spreading, very turgid, acute, entire, longitudi- 

 nally striate. 



22. reticulata, Haw. ( A loe reticulata, Haw. A . pumila, 

 Linn. A. herbacea, DC. A. arachnoldes reticulata. 

 Aplcra reticulata, Willd.). Lvs. as in the last, or 

 slightly ciliate on the angles, the striations anastomo- 

 sing. B.M. 1315. L.B.C. 14:1354. 



23. altilinea, Haw. (H. mucrondta, H. limpida and 

 JET. aristdta, Haw. Aloe altilinea, Schult. f. ). Lvs. en- 

 tire, aristately pointed, longitudinally striate. 



24. axtLcbnoltiLes, Haw. ( Aide arachnoldea, Mill. Aplcra 

 arachnoldes, Willd. Catevala arachnoldea. Medic.). 

 Lvs. more flattened -triquetrous, aristately pointed, the 

 angles ciliate-toothed. B.M. 756. 



BB. Margin and keel of Ivs. horny -bordered. 

 25.albicans, Haw. (H. l&vis, Haw. Aide Icevigata, 

 Schult. A . dlbicans, Haw. A. margindta, Lam. Aplcra 

 dlbicans, Willd.). Lvs. broad, 3-sided, acute, entire, 

 smooth or with a few dorsal tubercles, white-bordered. 

 B.M. 1452. WILLIAM TRELEASE. 



HAWTHORN. See Cratcegus. 



HAWTHORN, EAST INDIAN. Raphiolepis ovat.a. 



HAZARDIA (Barclay Hazard, Californian botanist). 

 Compdsitce. This includes a small Californian subshrub, 

 with silvery leaves and peculiar, not pretty, heads of fls., 

 borne in August. It is suitable for rockeries and bed- 

 ding out, but there are better woolly-leaved plants in 

 cult. The genus has about 4 species of stout, tomentose, 

 deciduous shrubs of the islands off the coast of Calif.: 

 heads white-tomentose, numerous, in large cymose pani- 

 cles, which terminate the branches; rays 5-8, neutral, 

 very short, ligulate or irregularly 5-toothed or lobed, 

 pale yellow changing to brownish purple. In 1887 E. L. 

 Greene made this new genus, remarking that it differs 

 from Diplostephium mainly in habit, the paucity, re- 

 duced size, and different color of its rays. It also lacks 

 the tuft of hairs characteristic of the style-tips of Co- 

 rethrogyne. 



detbnsa, E. L. Greene. ( Corethrdgyne detonsa, Greene) . 

 Lvs. of firm texture, 3-5 in. long, obovate-oblong, 

 coarsely serrate; upper surf ace of older Ivs. partly di- 

 vested of the white toment^um which covers all other 

 parts of the plant. F. FRANCESCHI and W. M. 



HAZEL. See Corylus. Chilean. Hazel is Gevuina 



Avellana. 



HEAL-ALL. Brunella. 



HEART'S EASE. Old English name for Pansy, Viola 

 tricolor. 



HEARTSEED or BALLOON VINE. Cardiospermum. 



HEATH, HEATHER. The common Heather of Old 

 World literature is a hardy plant, Calhina vulgaris. 

 The greenhouse Heaths are from the Cape of Good 

 Hope and Europe, and belong to the genus Erica. For 

 St. Dabeoc's Heath, see Dabop-da. 



HEATING is discussed under Greenhouse Heating, 

 Construction and Management. 



HEBECLtNIUM. All referred to Hupatorium. 



HECHTIA (J. G. H. Hecht, who died in 1837). Bro- 

 melidcece. A genus of 15 species of Mexican succulent 

 plants, 'one of which is perhaps cult, in a very few fan- 

 ciers' collections of tender plants for its dense rosettes 

 of recurved spiny Ivs., which are purple above from the 

 middle to the tip and silvery beneath. The genus is distin- 

 guished by having dioecious fls. The fls. have no decora- 

 tive value, being one-third of an inch across, white, in 



