138. Echeveria pringlei (S. Watson) Rose.

(Figure 218. Plate 15, upper; see page 241.)

Echeveria pringlei (S. Watson) Rose, in Britton and Rose, Bull. New York Bot. Gard., vol. 3, p. 6, 1903; Britton and Rose, N. Amer. Fl., vol. 22, p. 16, 1905; Poellnitz, in Fedde Repert., vol. 39, p. 214, 1936.

Cotyledon pringlei S. Watson, Proc. Amer. Acad. Arts and Sci., vol. 25, p. 148, 1890.

Plant densely pubescent on all exterior portions, trichomes colorless, trans­parent, to 0.2 mm. long, straight or tapering to base; stem evident, to 10 cm. tall or more, with numerous, decumbent or ascending branches; leaves laxly rosulate or scattered, thinnish, scarcely turgid, to 4 cm. long and 2 cm. broad, oblanceolate to rhomboid-obovate, acute or mucronate, flat or recurved; in­florescences simple, equilaterally-racemose, to 20 cm. long; peduncle spread­ing, to ascending above; lower bracts rhomboid-obovate, to 3 cm. long, cus-pidate-apiculate, recurved; raceme with 12 or more flowers; upper bracts obo-vate, less than 25 mm. long; pedicels stout, 4 to 8 mm. long, bracteolate; sepals subequal, longest to 14 mm. long, narrowly-lanceolate, acuminate, as­cending to spreading; corolla urceolate, sharply pentagonal, to 15 mm. long, 10 mm. thick below middle, 9 mm. wide at mouth; petals sharply keeled, ob-long-oblanceolate, acuminate, with subterete apiculus at the slightly spreading tips, at base with deep hollow within; carpels slender, 10 mm. long; nectaries narrowly lunate-reniform, 1.5 mm. wide. Flowers from November on. De­scription from living plant received from University of California Botanical Garden, 1955.

Figure 218. 138. Echeveria pringlei (S. Watson) Rose. Flowering plant, x 0.5. Plant photographed in San Diego 14 November 1964; collected by Senor Zabaleta near Experiencia, Jalisco, Mexico (UCBG 53.1156).

Color. Leaves and bracts leaf-green, asphodel-green beneath; sepals spin­ach-green; corolla peach-red to coral-red or scarlet; petals inside apricot-buff; carpels sea-shell pink; styles light hellebore-red; nectaries nearly white.

Type. Pringle, 1888/1853 (GH; isotypes MEXU,NY,US), collected on dry ledges of barranca, Guadalajara, Jalisco, Mexico.

Occurrence. Region of type locality.

Collections. The type collection; barranca at Guadalajara, Pringle, 03/ R-870 (flowered, CAS,NY), Rose and Painter, 03/870 (GH,MEXU,US).

Remarks. The living material on which my description is based was col­lected at Experiencia, near Guadalajara, by Sr. Zabaleta (UCBG 53.1156), not very far from the type locality. According to Dr. Uhl, the chromosome number of E. pringlei is n = 23, the same as in E. pulvinata. The present spe­cies differs from related hairy species as follows: from E. pulvinata and E. leu-cotricha in its spreading sepals, from E. coccinea and E. pubescens in its elon­gated pedicels, from E. pilosa and E. setosa in its simply racemose, equilateral inflorescence with bracteolate pedicels, and from E. carminea and E. amphoralis in its smaller corolla. The simple trichomes of the last two species are very similar to those of E. pringlei.

Plate fifteen. 138. Echeveria pringlei (S. Watson) Rose. Inflorescence, x 1.4. Plant flowering in San Diego 18 November 1964; collected at Experiencia, Jalisco, Mexico by J. B. Zabaleta (UCBG 53.1156, a cited collection). [See page 402]

© Echeveria, 1972