HAWORTHIA 



9. margaritifera, Haw. [H. m<Yiiir. Duval. AUe mar- 

 garitifera , Burra. ) . Lvs. turgid, spreading, merely acute, 

 both faces witli scattered coarse wliite tubercles, which 

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

 into several named forms. 



DD. The h'S. less conspicuously tchite-tuberculate. 



10. rugdsa, Bak.(4/6erK3d.v<i, Salm-Dyck. IT. Mddula 

 asperior). Lvs. long attenuate, spreading, plano-convex, 

 both faces with irregularly placed, rather coarse green- 

 ish tubercles. 



HECHTIA 



715 



1022. Haworthia Reinwardtii. 



11. subulata, Bak. {Aide subiildta, Salm-Dyck). Like 

 the preceding, but the scattered or rugosely confluent 

 tubercles very small, whitish. 



12. B&dvUa, Haw. {Aide Sddula, Jacq. Aplcra Bd- 

 rfitto, Willd. ). Lvs. shorter, the white tubercles finer. 

 Cape. 



13. hjhrida, Haw. Lvs. short, more turgid, the upper 

 face somewhat rugose, the lower with scattered green 

 tubercles. Cape! 



cc. Shape of lvs. ovate to deltoid, succulent, not tuber- 

 culale, .ipreading, the rosette often somewhat 

 elongated. 



14. tesaellkta,,'Ha.w. (Aide tessellAta,Schn\t. {.). Lvs. 

 acute or acuminate, setosely denticulate, scabrous be- 

 neath, the smooth upper surface with pale lines anas- 

 tomosing in squares. 



15. recurva, Haw. {Aide t-ecurva. Haw. Ap'icra re- 

 ciJrua,Willd.). Lvs. entire, scabrous beneath, the smooth 

 upper surface longitudinally pale striate. B.M. 1353. 



16. cymbifbrmis, Haw.(/r. coHcfira, Haw. Alie cymbi- 

 firniis. Haw. A. cjimbirfdlia , Schrad. Ap'icra cymba:- 

 fblia, Willd. I . Lvs! entire, smooth, rather obtuse, longi- 

 tudinally striate. B.M. 802. 



coc. Shape of lvs. cuneately prismatic, pellucid. 



D. The lvs. erect, obliquely truncate, with deltoid, pale- 



striate apex. 



17. miribilis, Haw. {Aloe minlbilis. Haw. Ap)cra 

 tnirdbilis, Willd.). Lvs. eiliate-denticulate on margin 

 and keel, sparingly tuberculate beneath. B.M. 135-t. 



18. asperula, Haw. {Aide asp^rula, Schu\t. f.). Lvs. 

 entire, finely scabrous. 



19. retiksa. Haw. {Aide retii.'ia, Linn. Ap)cra retiisa, 

 Willd. Catevdla retiisa, Medic). Lvs. entij-e, smooth. 

 B.M. 455. 



DD. The lvs. erecto-Sjireading, pointed, smooth. 



20. cuspid&ta. Haw. (>1 We ciispfcMfn, 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. reticuia.ta, Haw. (.4 We reHcxM^a, Haw. A.piimila, 

 Linn. A. herb&cea, DC. A. arachnoldes reticuldta. 

 Aplcra reticuldta, 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. {ff. mucron&ta, H. limpida and 

 H. aristdta.UiWX. Aide allilinea, Schult. i.). Lvs. en- 

 tire, aristately pointed, longitudinally striate. 



24. arachnoldes. Haw. (JMeai'nc7inolrfe«, Mill. Aplcra 

 arachnoldes, Willd. Oatevdla arachnoldea, Medic). 

 Lvs. more flattened-triquetrous, aristately pointed, the 

 angles ciliate-toothed. B.M. 756. 



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

 25. albicans. Haw. {II. la:vis. Haw. Aide Icevigdta, 

 Schult. A. albicans, Hnv. A . margiuAta, ham. Ap'icra 

 albicans, Willrt.). Lvs. broad, 3-sided, acute, entire, 

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

 B.M. 1452. William Trelease. 



HAWTHOEN. See Cratiegus. 



HAWTHORN, EAST INDIAN. Baphiolepis ovata. 



HAZARDIA (Barclay Hazard. Californian botanist). 

 Cum II ''is 1 1 If. 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, 

 ileciduous 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 Diplostepbium 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. 



detfinsa, E. L. (iveene.(Corethr6gyne rteMnsn. Greene). 

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

 coarsely serrate: upper .surface of older lvs. partly di- 

 vested of the white tomentjiim which covers all other 

 parts of the plant. p. Prancesohi and W. M. 



HAZEL. See Corylus. Chilean Hazel is Gevuina 

 Ave liana. 



HEAL-ALL. Brunella. 



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

 tricolor. 



HEAETSEED or BALLOON VINE. Cardiospermxcm. 



HEATH, HEATHER. The common Heather of Old 

 World literature is a hardy plant, Callnna 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 Daba'cia. 



HEATING is discussed under Greenhouse Heating, 

 Construclion and Managenievt. 



HEBECLlNIUM. All referred to £upalorium. 



HfiCHTIA (J. G. H. Hecht, who died in 1837). £ro- 

 melidceic. 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 lvs., 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 



