COTYLEDON 



COTYLEDON 



869 



axil of the leaf accompanies it, otherwise the leaf will 

 root but a plant will not form from it. Make a depres- 

 sion about 2 inches deep in the center and 4 inches wide 

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

 their bases touching each at the bottom of the depres- 

 sion; give no water until the small roots make their 

 appearance, 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 F. at night. For summer bedding pur- 

 poses the following have been employed very success- 

 fully, being lower growers: C. atropurpurea, C. fulgens, 

 C. coccinea, C. fascicularis, C. gibbiflora var. metallica, 

 C. Pachyphytum, C. Peacockii, C. Purpusii, C. roseata, 

 C. secunda, C. secunda var. glauca, C. mexicana. (G. 

 W. Oliver.) 



Other species of Cotyledon occur in collections of 

 succulent plants, but the following probably represent 

 those of commerce in this country. 



INDEX. 



A. Plants of the Old World, of various habit: corolla-tube 



elongated, usually much longer than the calyx. 

 (Cotyledon and Umbilicus.) 



B. Lvs. crowded in a rosette (rosulate) at the base of the 



St.: plant low, more or less stemless: species of the 

 houseleek or hen-and-chickens type, used in rock- 

 gardens and for carpet-bedding. 



c. Fls. yellow or milk-white. 



1. Aizdon, Schoenl. (Umbilicus Aizbon, Fenzl). 

 Plant small, minutely pubescent, the st. very short: 

 Ivs. densely rosulate, Ungulate, obtuse, ciliate, those 

 on the st. 'oblong-obtuse: fls. golden yellow, on very 

 short pedicels; calyx spreading; corolla-parts lanceolate- 

 acuminate and keeled. Asia Minor. 



cc. Fls. red or greenish. 



2. Barbeyi, Schweinf. Whole plant hoary-white, 

 tall and branching: Ivs. thick, fleshy, shovel-shaped: 

 fls. olive-green and red, 1 in. long, in a close panicle. 

 Blooms freely in spring and summer. Abyssinia. Gt. 

 45, p. 465. An exquisite plant for carpet-bedding. 



BB. Lvs. variously scattered along the st., or sometimes in 

 rosettes or clusters at the ends of the branches: mostly 

 branching plants, grown in greenhouses, window- 

 gardens, and sometimes used in summer bedding-out 

 but not in carpet-bedding designs. 



c. Fls. white or ochroleucus. 



3. reticulata, Thunb. Sts. much branched, fleshy: 

 Ivs. few at the ends of the branches cylindrical, acute, 

 erect, fleshy, soft, smooth, %in. or 



less long: fls. Hin. or less long, 

 whitish, in an erect, dichotomous 

 panicle. Cape. G.C. III. 21:282. 

 The wiry fl. -stalks remain on the 

 plant and give it the appearance of 

 being inclosed in a network. Odd. 



4. chrysantha, Hort. (Umbilicus 

 chrysdnthus, Boiss.). Plant pubes- 

 cent, glandular above, the st. short: 

 Ivs. rosulate, short, oblong-spatu- 

 late, obtuse, those on the st. elliptic 

 and somewhat acute: fls. large, 

 ochroleucous (milk-white or yellow- 



ish), red-striped on the back of the oblong-lanceolate 

 keeled lobes or parts of the corolla. Perennial. Asia 

 Minor. 



cc. Fls. yellow or greenish. 



5. Umbilicus, Linn. (Umbilicus pendulinus, DC.). 

 PENNYWORT. NAVELWORT. Perennial, 6-12 in. high 

 in flower, simple or slightly branched, leafy at base: 

 radical and lower Ivs. fleshy, orbicular, crenate, more 

 or less peltate: fls. yellowish green, pendulous, in a 

 raceme; calyx very small; corolla cylindrical, }^in. 

 long but somewhat enlarging, with 5 short teeth. On 

 rocks and walls, W. Eu. Adaptable in rock-gardens. 



ccc. Fls. red or purple. 



6. fascicularis, Soland. Smooth, 1-2 ft. high, thick- 

 stemmed, branched: Ivs. pale greenish white with a 

 yellowish margin, glaucous, few, sessile, cuneate-obo- 

 vate, thick, flattened, slightly concave, cuspidate: 

 panicle branches long, scorpioid; fls. large, 1 in. long, 

 pendent; calyx-lobes short, broadly ovate-acute; 

 corolla-tube much longer than the calyx, with a green- 

 ish tube and reddish revolute limb. S. Afr. B.M. 5602. 

 J.H. III. 29:443. 



7. Sempervivum, Bieb. (Umbilicus Sempervivum, 

 DC.). HOUSELEEK COTYLEDON. Plant green, glandu- 

 lar: radical Ivs. spatulate, obtuse, attenuate-cuneate at 

 base, the margin denticulate; st.-lvs. oblong: fls. pur- 

 plish and papillose on the outside, on secund branches in 

 a corymbose panicle; corolla thrice longer than calyx, 

 parted to the middle, the parts lanceolate-acuminate 

 and somewhat recurved. Perennial. Not to be con- 

 founded with Sempervivum tectorum. 



8. orbiculata, Linn. Erect, 2-4 ft. high: Ivs. oppo- 

 site, flat, obovate-spatulate,- obtuse, mucronate, glau- 

 cous and mealy, with red margins: fls. large, reddish, 

 panicled. Fls. June-Sept. S. Afr. B.M. 321. R.H. 



1857, p. 347. Grows well from 

 cuttings. Variable, and has sev- 

 eral named forms as var. elata, 

 oblonga, ramosa, rotundifolia. 



9. hispanica, Linn. (Pistorlnia 

 hispanica, DC . ) . Annual or bien- 

 nial, branched, 6 in. high, erect: 

 Ivs. small, nearly cylindrical, ob- 

 long, few, sessile: fls. erect, in 

 cymes, reddish; corolla trumpet- 

 shaped, lobes spreading. Spain, 

 Morocco. R.H. 1895, p. 472. 



AA. Plants of the New World: 

 corolla -tube usually short, 

 perhaps always shorter than 

 the calyx. 



B. Lvs. terete. (StylophyUum.) 



10. edftlis, Brewer (Sedum 

 edule, Nutt. Stylophyllum edule, 

 Brit. & Rose). Sts. cespitose, 

 very short and thick: Ivs. cylin- 

 drical, 3-4 in. long, erect, whitish 

 or glaucous green, not mealy: fls. 

 white, tinged with green, re- 

 sembling those of Sedum, J^in. 

 diam., short-pedicelled, along the 

 upper sides of the flexuous 

 branches of the cymose panicle; 

 scape 1 ft. high. San Diego, 

 Calif. Young Ivs. eaten by 



Indians. 



BB. Lvs. linear or 



nearly so. 



11. mexicana, Hemsl. 

 Plant glabrous, 3-4 in. 

 high, erect, the branches 

 woody: Ivs. few, alternate, 



1083. Cotyledon secunda. (Detail 



