COTTON 



The carpels or cells of the pod are 3-5. These carpels 

 break open, and the cotton covering of the seeds makes 

 a globular mass, — the Cotton boll (Fig. 565). Cotton is 

 not a horticultural crop, and is therefore not considered 

 In this work. The reader will find "The Cotton Plant" 

 (published by the Dept. of Agr., Bull. 33), a useful 

 monograph. 



COTTONWOOD. Species of Popiilit.'i. 



COTYLEDON (a name u-.-l l.v Pliny). r,-„..,v„M,vr, . 

 Includes A'chererhi. Sii.i-ul.nt hn h^ ,.r >linil.s. ivu-.Iy 

 annual; branches and leav.> Tln.k ;unl iii-li\ : l\ ^. ..pj.u- 

 site or alternate, petiolati' ■■v -i--il.': r;il\x .'i pjrt. .1. ;i- 

 long as or shorter than tin- .-..iclhi tulir; |iitaN .'.. iiirt 

 than the 10 



COTYLEDON 



387 



iicle ; scape 



Species 60 or more. Calif, and Mes., Afr., As. and Eu. 

 See I.H. 10:76 for an account of numy of the species. 



Large-growing Cotyledons. ^U'-h as ('. if!hh!f!<ini ,\tiv. 

 metalUca, should be incr.a>..l l.y .uttiims tak, ii after 

 the bedding season is ov.i-. 'Y\\'- I" -t iihiIim,! is t.. cut 

 off the top of the plant, dnss ilir l"iti..ni part, and jjaco 

 the cuttings in empty i-inch pnts, tin- huttom leaves 

 resting on the rira of the pot until the cut heals over and 

 a few small roots are formed. They may then be potted 

 off into suitably sized pots, using sandy loam. No water 

 will be nei'dfd for several days, and when given it must 

 beonly spaiinirly. Tlnold stemsshould be placed rather 

 close to-, til, 1- 111 vliall.iw lioxes and kept in awarm, dry 

 place, win I--- tin \- will tVirm small growths along the 

 stems; tins.-, wln-n laru'c enough, may be put into boxes 

 of dry sand, and potted in thumb- or 3-inch pots 

 when they have made a sufficient quantity of roots. 

 When it is desired to increase the low-growing bedding 

 kinds on a larger scale, the plants should be lifted before 

 the ground gets too wet and cold. They may either be 

 boxed in dry soil and kept in a cool, dry house, or placed 

 thickly together in a frame, taking care that no drip is 

 allowed on the plants, and giving no water. The most 

 convenient time for propagation by leaves is during the 

 months of November and December, when the fall work 

 of rooting soft-wooded plants is over. Leaves rooted at 

 this time will make plants large enough for planting out 

 the following season. They will take from three to four 

 weeks to root, according to the kind. The leaves must 

 be taken from the plant as follows ; Grasp each leaf be- 

 tween the thumb and forefinger, give a gentle twist first 



side then 

 taking care that tin 

 accompanies it. «>t!i 

 will not form fri'ii 

 inches deep in tin 

 the sand bed, in tl 

 bases touching ftn 

 give no water unti; 

 ance, and only sli 

 plants are large e 

 sandy loam, and ki 

 60°P at night. 



For bedding purposes the following 

 ployed very successftilly: C. ntrnpnrpiit 



other until the leaf 

 lit tuid in the axil of the leaf 

 In- liaf will root but a plant 

 a 1-1 tl depression about two 

 ami f"ur inches wide across 

 w,, nuvs of leaves with their 

 I- iM.ttnm of the depression; 



mil I ts make their appear- 



It.iH-tirds. When the little 

 Iny should be boxed, using 

 temperature of not less than 



aave been em- 



ir. rnlifnrnica, 



■■>■.' rai-. mi'tal- 



Uca, !'■!• 'i"ifl"'' 'I >■< . J' ■■ ■ •- '" ..inifla 



var. ;//"'. ■ . ./ .,. ,,7o- 



hosa val- s ; i/.ills, 



parvif"/". ~-.ain- nf till-,' arr ii..t mHi-i-i -I in ihr Ameri- 

 can trade. Several of the kinds make ver_ orn.imental 

 winter flowering plants; among them areC. gibbi flora 

 and its forms, C. fulgens and C. coccinea. For this pur- 

 pose the large plants should be lifted from the beds and 

 carefully potted, as they make a much finer growth in 

 the open ground than when grown in pots. 



Cult, by G. W. Oliver. 



A. Z/vs. crowded in a rosette at the base of the stem. 

 B. Fls. white, tinged with green. 



^dnlis, Brewer {Sediim iditle, Nutt.). Stems cespi- 

 pitose, very short and thick; Ivs. cylindrical or obtusely 

 3-sided, 3-4 in. long, erect, whitish or glaucous-green, 

 not mealy: fls. white, resembling those of Sedum. % in. 

 in diam., short-pedicelled, along the upper sides of the 



flexuous branches of the cymose 

 high. San Diego. Calif.-Int. 1883. 



BB. Ji'ls. pale yellow. 



Califdmioa, Baker (C. Idxa. B. & H.). Lvs. in a ro- 

 sette, concave, ligulate, lanceolate, acute, glaucous, 

 mealy, slightly yellowish, 8 in. long: fls. pale yellow, on 

 weak lateral flowering stems 1-2 ft. long, with short, 

 ovate, clasping lvs. or bracts and bi- or trifid racemes. 

 Calif. 



BBB. Fls. pale flesh color. 



puIveruUnta, Baker (Echeveria pulveruUnta, Nutt.). 

 Lvs. in a rosette, silvery green, very mealy, spatulate, 

 tnute, the tips reflexed, the cauline lvs. gradually di- 

 minishing into broadly cordate, clasping bracts: pani- 





cles dichotomously branched ; pedicels .slightly longer 

 than the pale flesh-colored fls. Plants 1 ft. in diam. 

 S. Calif. F.S. 19:1927, 1928.-A fine plant for carpet- 

 bedding. 



BBBB. Fls. red and green or red and yellow. 



seciinda, Baker (Echeveria secilnda. Booth). Stem- 

 less; lvs. in a rosette, crowded, cuneiform, mucronate, 

 glaucous, curving upward ; fls. in a 1-sided, recurved 

 spike, reddish yellow : peduncle long, 6-12 in. high. 

 June-Aug. Mex. — Pine for borders or carpet-bedding. 

 There is a var. glaiica, Hort. 



lanceoUta, B. & H. {Echeveria lanceoUta, Nutt.). 

 Lvs. in a rosette, lanceolate, acuminate, slightly mealy; 

 stem-lvs. or bracts small, cordate, clasping, distant ; 

 panicle narrow, dichotomous: fls. red and yellow. Calif. 



B4rbeyi, Schw. Whole plant hoary-white : lvs thick, 

 fleshy, shovel-shaped : fls. olive-green and red. Plower.« 

 freely in spring and summer. Abyssinia. Gt. 45, p. 465. 

 — An exquisite plant for carpet-bedding. 

 AA. Jjvs. scattered along the erect or branching stems. 



faaciculiris, Soland. Smooth, 1-2 ft. high ; lvs. pale 

 greenish white with a yellowish margin, glaucous, few, 



