Chorizanthe xanti |
Chorizanthe palmeri |
|||||
---|---|---|---|---|---|---|
riverside spineflower, Xantus' spineflower |
Palmer's spineflower |
|||||
Habit | Plants erect to infrequently spreading, (0.3–)0.5–2.5(–3) × 0.5–3(–5) dm, thinly pubescent. | Plants erect to spreading, (0.5–)1–3(–4) × 1–3 dm, appressed-pubescent. | ||||
Leaves | basal or nearly so; petiole 1–2(–3) cm; blade oblong or oblong-ovate to ovate, 0.3–1(–1.5) × 0.3–0.8(–1) cm, thinly pubescent adaxially, densely tomentose abaxially. |
basal; petiole 1–3 cm; blade oblanceolate, 1–3 × 0.4–0.8 cm, thinly pubescent. |
||||
Inflorescences | mostly flat-topped and openly branched, usually reddish; bracts persistent, 2, usually leaflike at proximal nodes and similar to proximal leaf blades only more reduced, short-petiolate, oblong-ovate to ovate, 0.3–0.8 cm × 2–6 mm, becoming sessile, reduced and scalelike at distal nodes, linear, acicular, often acerose, 0.1–0.4 cm × 0.5–1 mm, awns straight, 0.5–1 mm. |
with involucres in dense clusters 2–4 cm diam., greenish or reddish to purple; bracts 2–3 at proximal node, usually leaflike, often with whorl of sessile bracts about midstem, elliptic, 0.5–1.5 cm × 2–6 mm, becoming gradually lanceolate to elliptic, 0.2–1 cm × 1.5–5 mm, at distal nodes scalelike, linear and aciculate, acerose, awns straight, 1–3 mm. |
||||
Involucres | in open clusters with 1 at node of dichotomies, reddish, cylindric, not ventricose, 3–4.5 mm, not corrugate, without scarious or membranous margins, thinly to densely pubescent; teeth spreading, unequal, 0.7–1.5 mm, 3 longer ones more erect than 3 shorter and less-prominent ones; awns uncinate, 0.5–1 mm. |
3–10 or more, reddish to purplish, urceolate, slightly ventricose basally, 3.5–4 mm, without scarious or membranous margins, slightly corrugate, thinly pubescent with slender, curly hairs; teeth erect to spreading, unequal, 1–2 mm; awns uncinate, 0.5–1 mm with longer anterior one mostly 1 mm. |
||||
Flowers | long-exserted; perianth rose to red, infrequently with white lobes, cylindric, 4.5–6 mm, pubescent; tepals connate ca. 2/3 their length, monomorphic to slightly dimorphic, narrowly oblanceolate, rounded apically, those of outer whorl occasionally slightly broader and longer than those of inner whorl; stamens 9, mostly included; filaments distinct, 4–6 mm, glabrous; anthers pink to red, oblong, 0.5–0.6 mm. |
exserted; perianth bicolored with floral tube white to yellow and tepals red, maroon, or dark purple, cylindric, 4–5 mm, glabrous or with few scattered hairs along midrib ca. midlength; tepals erect, connate 1/2 their length, dimorphic, obovate, those of outer whorl slightly longer than inner whorl, entire, rounded apically, those of inner whorl fimbriate and truncate or somewhat 2-lobed; stamens 9, exserted; filaments distinct, 4–5 mm, glabrous; anthers pink to red or maroon, oblong, 0.9–1 mm. |
||||
Achenes | brown, lenticular, 4–4.5 mm. |
brown, globose-lenticular, 3–3.5 mm. |
||||
2n | = 38, 40, (48). |
|||||
Chorizanthe xanti |
Chorizanthe palmeri |
|||||
Phenology | Flowering May–Aug. | |||||
Habitat | Gravelly to rocky serpentine and serpentinized igneous outcrops, mixed grassland communities, pine-oak woodlands | |||||
Elevation | 60-700 m (200-2300 ft) | |||||
Distribution |
CA
|
CA
|
||||
Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Chorizanthe palmeri is known only from the Santa Lucia Mountains, the San Luis Range, and the Huasna area. Populations differ slightly both morphologically and ecologically, but recognition of variants is not suggested. At full anthesis, the reddish stems, involucres, and tepals, plus the localized concentrations of individuals provide for splashes of purplish red on the otherwise grass-brown slopes. Set against the often blackish green of serpentine barrens, the plants can be spotted even from a high-flying aircraft! This species would make an excellent addition to the garden border. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||
Key |
|
|||||
Source | FNA vol. 5, p. 463. | FNA vol. 5, p. 457. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | S. Watson: Proc. Amer. Acad. Arts 12: 272. (1877) | S. Watson: Proc. Amer. Acad. Arts 12: 271. (1877) | ||||
Web links |