This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
(named for Ata-nasio Echeverria, an excellent Mexican botanical draughtsman). Crassulaceae. Stemless or somewhat caulescent succulents. Leaves fleshy, but usually broad and flat, commonly making dense rosettes: flowers borne in loose spikes or racemes or sometimes paniculate, but never in a flat cyme; calyx deeply 5-parted; sepals usually elongated and narrow, unequal, commonly spreading but sometimes erect; corolla 5-angled, usually strongly so, very broad at base; stigma-lobes united below, very thick and nerveless, erect but often spreading at tip; stamens 10, 5 attached near the middle of the petals, the other 5 either free or attached lower down on the corolla: carpels 5, erect; ovules and seeds many. - More than 60 species of this genus have been described. Most of them have been in cult, in Washington and at the New York Botanical Garden, although but few are in the trade. It is confined almost entirely to Mex., one species extending into the mountains of W. Texas, and one or two species extending into Cent. Amer. Many of the species are valuable for flat bedding on account of their compact rosettes and highly colored foliage.
For cultural notes, see Cotyledon (with which it has been united by many authors).
A. Sepals orbicular, very small, obtuse. b. Corolla twice as long as thick; sepals appressed.
1. amoena, De Smet. Nearly stemless, with numerous offshoots: leaves in small but dense rosettes: flowering branches slender, 4-8 in. long; flowers 1-8, in slender racemes; corolla red, 4-5 lines long. Native of Mex. - This species was introduced into cult, nearly 40 years ago.
bb. Corolla little longer than thick; sepals not appressed.
2. microcalyx, Brit. & Rose (E. Purpusii, Brit.). Shortly caulescent, sometimes 1 ft. high: corolla yellow-pink, 4 lines long. Native of Mex.
aa. Sepals linear to ovate. b. Flowers axillary, arranged in loose spikes or racemes.
c. The flowers in spikes.
d. Plant not caulescent, glabrous throughout.
3. mucronata, Schlecht. Caulescent, glabrous throughout: basal leaves in a dense rosette 4-8 in. long: flowers sessile; corolla 1 in. or more long, reddish tinged with yellow. E. Mex.
dd. Plant caulescent, pubescent throughout.
4. coccinea, DC. (Cotyledon coccinea, Cav.). stem 1-2 ft. high, finely grayish pubescent: leaves oblanceolate, largest 8-9 in. long: infloresence a spike of 15-25 flowers Common in Cent. Mex. Page 870.
5. pubescens, Schlecht. (Cotyledon pubescens, Baker). A similar species is sometimes cultivated,with obovate-spatu-late leaves
cc. The flowers in racemes.
d. Species caulescent.
e. Infloresence compound below; corolla pale.
6. Iinguaefolia, Lem. stems 1 ft. or more high, very leafy: leaves thick, fleshy, green, nearly terete at base: flowering branches long and drooping, each consisting of a simple raceme: flowers cream-colored. Mex. - This species has long been in cultivation, and has not been collected wild in recent years. It is so very different from the other echeverias of Mex. that we are led to suspect that it may be of hybrid origin.
ee. Infloresence simple throughout; corolla bright-colored. f. Plant pubescent throughout.
7. pulvinata, Rose (Cotyledon pulvinata, Hook.). stems 4-6 in. high, somewhat branching, becoming naked below: young branches, leaves and sepals covered with a velvety pubescence: leaves clustered in rosettes at the top branches, about 1 in. long, very thick: flowers in a leafy raceme; corolla scarlet, sharply 5-angled. Mex. - This is a very distinct echeveria, with a remarkable pubescence.
8. Pringlei, Rose (Cotyledon Pringlei, Wats.). This is perhaps nearest E. pulvinata, although not so pubescent nor so attractive a plant.
ff. Plant glabrous throughout.
9. atropurpurea, Baker (Cotyledon atropurpurea, Baker. E. sanguinea, Morr.). stems 4-8 in. high, glabrous throughout: leaves aggregated at the top of the stem in a dense rosette, usually dark purple above, somewhat glaucous: flowering branches elongated; sepals somewhat unequal; corolla bright red, strongly angled. Probably native of Mex., but known only from cult, specimens. Page 870.
dd. Species not caulescent.
10. lurida, Haw. (Cotyledon lurida, Baker). Plants stemless, glabrous and glaucous throughout: leaves forming a flat, rather open rosette, narrowly oblong, 2-4 in. long, acute, tinged with purple, especially when old: flowering branches 12-32-flowered; sepals thick, spreading or even reflexed; corolla bright red. Known only from garden material, but undoubtedly from Mex. B.R.27:l.
11. racemosa, Schlecht. & Cham. This is similar to E. lurida, and was considered by Baker to be a synonym; but they are here kept distinct. The material of E. racemosa now in cultivation was secured at the type locality of the species, Jalapa, Mex.
12. carnicolor, Morr. (Cotyledon carnicolor, Baker). Another somewhat similar species, but with only 6-8 flowers It is known only from garden specimens.
13. maculata, Rose. This belongs also to this, alliance, but grows at higher localities in Mex., and has brighter green leaves It ought to live throughout the year in our southern gardens.
bb Flowers terminal, arranged in secund spikes or racemes, either simple or compound.
c. Infloresence a simple raceme.
d. Plant hairy throughout.
14. setosa, Rose & Purpus. Plants stemless, giving out offsets from the base: leaves often 100 or more, forming a dense, almost globular, rosette, thickish but flattened, about 2 in. long, covered on both sides with setiform hairs: infloresence usually a simple secund raceme with 8-10 flowers; petals red at base, yellow at tip, setose without. Contr. Nat. Herb. 13: pi. 10. - A very peculiar species, recently collected by C. A. Purpus in Puebla, Mex.
dd. Plant glabrous throughout. e. The fls, sessile.
15. Peacockii, Croucher (Cotyledon Peacockii, Baker). Stemless: leaves about 50 in a close rosette, obovate, spatulate, white-glaucous, slightly red toward the tip, faintly keeled on the back: flowering branches forming a scorpioid spike; corolla bright red, 6 fines long. It is doubtless of Mexican origin, although often reported as from New Mex. or Calif. Page 870.
ee. The flowers pedicelled. f. Lower pedicels short.