Chorizanthe blakleyi
Chorizanthe procumbens
Blakley's spineflower
prostrate spineflower
basal;
petiole 0.5–2 cm;
blade oblanceolate, 0.5–2.5 × 0.3–0.8 cm, thinly pubescent.
basal;
petiole 0.5–2(–3) cm;
blade oblanceolate, (0.5–)1–3(–4) × 0.1–0.7(–1.2) cm, thinly pubescent.
with involucres in dense clusters 1–2 cm diam., yellowish green;
bracts 2, without whorl of sessile bracts about midstem, usually leaflike, oblanceolate, 0.5–1.5 cm × 1.5–3 mm, gradually reduced and becoming scalelike at distal nodes, linear, aciculate, acerose, 0.3–0.8 cm × 1–2 mm, awns straight, 1–2.5 mm.
with involucres in small, open clusters 0.3–1 cm diam., greenish yellow to green or reddish green;
bracts 2, sessile, leaflike and similar to proximal leaf blades only reduced, linear-oblanceolate to elliptic, 0.3–1(–1.5) cm × 1.5–5(–8) mm, rapidly reduced and scalelike at distal nodes, linear, acicular, often acerose, 0.1–0.5 cm × (0.3–)0.5–3 mm, awns straight, 0.2–1 mm.
3–10+, yellowish green, urceolate, slightly ventricose basally, 3–4.5 mm, slightly corrugate, without scarious or membranous margins, thinly pubescent;
teeth spreading, unequal, 1–3 mm;
awns straight or uncinate with longer anterior one straight or slightly curved, mostly 2 mm, others uncinate, 0.5–1.5 mm.
3–10, rarely more, greenish yellow to reddish green, cylindric or narrowly to broadly campanulate, not ventricose,1.5–3 mm, faintly corrugate, without scarious or membranous margins, thinly pubescent with spreading hairs, longest hairs on ribs and at base;
teeth spreading, equal, 1–2.5 mm, or divergent, thickened basally, unequal, 1–2 mm or 2.5–5 mm with hyaline margins between teeth;
awns uncinate, 0.2–0.5 mm.
exserted;
perianth bicolored with floral tube greenish white to white and the lobes white to pinkish, cylindric, 5–6 mm, sparsely pubescent;
tepals connate 2/3 their length, dimorphic, obovate, those of outer whorl erect, slightly longer than those of inner whorl, 2-lobed apically, those of inner whorl erect, 2-lobed, erose apically;
stamens 9, included;
filaments distinct, 5–5.5 mm, glabrous;
anthers yellow to golden, oblong, 1–1.2 mm.
exserted;
perianth yellow or sometimes white, cylindric, (1.7–)2–3 mm, pubescent;
tepals connate ca. 2/3 their length, essentially monomorphic, narrowly oblong to narrowly obovate, occasionally with outer lobes slightly broader and longer than inner ones, entire apically;
stamens 9, exserted;
filaments connate basally into 0.2–1 mm tube, (0.3–)0.5–2.5 mm, pilose-ciliate;
anthers cream to pale yellow, oblong, (0.2–)0.5–0.7 mm.
brown, globose-lenticular, 3–3.5 mm.
brown, lenticular, 1.5–2.5 mm.
= ca. 38.
= (38), 40, (42, 44, 46).
Chorizanthe blakleyi
Chorizanthe procumbens
Of conservation concern.
Chorizanthe blakleyi is known only from north-facing slopes and foothills of the Sierra Madre. The species is rare and localized. The yellowish green stem, branches, and involucres readily distinguish it. The white flowers align it with C. obovata.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Chorizanthe procumbens is a variable complex of widely scattered, locally infrequent to common populations that occur from the Santa Monica, San Gabriel, and San Bernardino mountains southward through western Riverside and Orange counties to San Diego County. In a strict sense, prostrate plants from San Diego southward belong to C. procumbens (including C. jonesiana) while decumbent plants to the north are C. uncinata (C. procumbens sensu G. J. Goodman 1934), if such a distinction is considered taxonomically useful. Plants with a grayish hue south of our range in Baja California have been described as C. chaetophora. All of our plants have a greenish yellow cast.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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