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 Popidm. 



COTYLEDON (a name used by Pliny). Vrassulcieetr. 

 Includes Erln'vtria. Succulent herbs or shrubs, rarely 

 annual: bram-hes antl U-aves thick and fleshy: Ivs. oppo- 

 site or alternaii'. ixtinlatr or s.-ssik': calyx 5-parted, as 

 long as or sliurti-r tlian tin- corolla tube; petals 5, erect 

 or spreading, connate to the middle, longer than the 10 

 stamens. Differs from Sedum in the connate petals. 

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

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



COTYLEDON 



387 



bot 



Large-growing Cotyledons, such 

 metallica, should he increased by 

 the bedding season is over. The 1 

 off the top of the plant, d 

 the cuttings in emiity 4-inch ]tot 

 resting on the rim of the jiot until 

 a few small roots are formed. Tin 

 off into suitably sized pots, usin^^ : 

 will be needed for several <iays. ai 

 be only sparingly. Theold stems si 

 close together in shallow boxes an 

 place, where they will form sma 

 stems; these, when large enough. 

 of dry sand, and potted in tl 



(lilihiflonty var. 



gs taken after 



lefllod is to cut 



I'art, and place 



;, tile liottom leaves 



lie rut heals over and 



y may then lie potted 



aiidy loam, Nowater 



(i \\ hen given it must 



loulil be placed rather 



1 kept in a warm, dry 



1 growths along the 



may be put into boxes 



ii- or H-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. Tliey will take from three to four 

 weeks to root, according to The kiiel. The leaves must 

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

 tween the thumb and forefinger, give a gentle twist first 

 to one side then to the other until the leaf comes off, 

 taking care that the dormant bud in the axil of the leaf 

 accompanies it, otherwise the leaf will root biit a plant 

 will not form from it. Make a depression about two 

 inches deep in the center and four inches wide across 

 the sand bed, in this lay two rows of leaves with their 

 bases touching each at the bottom of the depression ; 

 give no water until the small roots make their appear- 

 ance, and only slightly afterwards. When the little 

 plants are large enough they should be boxed, using 

 sandy loam, and kept in a temperature of not less than 

 60°P at night. 



For bedding purposes the following have been em- 

 ployed V. rv su ssfullv: C. atr,,,,,i r/u, ,; „ . Ciliforliieil , 



eliinfoli.i. ,;;ri„,„. fa s,' i r ii hiri !: . <, ihhi I /„,<, var. i„efu7- 

 Ih-d, P.li-liDpln/lKiii. P,,ir,„-kii. i;isnl. ,,„ lula . serlDliJa 

 var. gliittca, imbriciilu, Mesivann, eximia, ijUihosii, glo- 

 bosa var. extensa, Scheideckerii, mucronata , iiiirnbilis, 

 parvifolia. Some of these are not offered in the Ameri- 

 can trade. Several of the kinds make ver, ornamental 

 winter flowering plants; among them are C. gibbi flora 

 and its forms, C. fiilgeits and C. foccinca. 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. OLn-ER. 



A. Jji's, crowded in a rosette at the base of the stem. 



B. Fls. white, tinged with green. 



^dulis, Brewer [Sedum. idule, 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 panicle ; scape 1 ft. 

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



BB. Fls. pale yellow. 



Calitbrnica, 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 trifld racemes. 

 Calif. 



BBB. Fls. pale flesh color. 



pulverul^nta. Baker (Echeveria pulveriiUnta, Nutt.). 

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

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

 minishing into broadly cordate, clasping bracts: pani- 





566. A species ol Cotyledon. 



cles dichotomously branched ; pedicels slightly longer 

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

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

 bedding. 



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



secunda, Baker {Echeveria secunda. 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. glattca, Hort. 



lanceol&ta, B. & H. {Echeveria lanceoldta, 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. 



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

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

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

 —An exquisite plant for carpet-bedding. 

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



fascicuIAris, Soland. Smooth, 1-2 ft. high : lvs. pale 

 greenish white with a yellowish margin, glaucous, few. 



