Chaenactis cusickii

A. Gray in A. Gray et al.
in A. Gray et al., Syn. Fl. N. Amer. ed. 2. 1(2): 452. 1886.
Common names: Morning brides Cusick’s pincushion
EndemicConservation concern
Treatment appears in FNA Volume 21. Treatment on page 410. Mentioned on page 400, 408, 409.

Plants 3.5–10(–15) cm; proximal indument grayish, sparsely arachnoid, glabrescent. Stems mostly 1–5; branches mainly proximal. Leaves basal (withering) and cauline (not notably smaller or sparser distally), 1–4 cm; largest blades ± oblanceolate, plane, ± succulent, not lobed (margins entire or distally ± crenate). Heads mostly 1–5(–12) per stem. Peduncles 0.5–2.5 cm, glabrescent distally (sparsely arachnoid early; bracts 1–2, leaflike, surpassing heads). Involucres ± hemispheric to campanulate. Phyllaries: longest 6–9(–10) mm (surpassed by florets); outer (uniformly) sparsely arachnoid to glabrescent in fruit, not stipitate-glandular (inner apically brownish-villosulous), apices usually erect, blunt, ± rigid. Florets: corollas (diurnal) white to pinkish, 3–7 mm (± equaling cypselae; anthers exserted); peripheral corollas ± erect, actinomorphic, scarcely enlarged. Cypselae 4–6 mm; pappi of (8–)10–14 scales in 2–3 gradually unequal series, longest scales 1.5–3.5 mm. 2n = 12.


Phenology: Flowering late Apr–Jun.
Habitat: Light-colored shrink-swell clay soils from volcanic ash and tuff, semiarid shrublands
Elevation: 700–1300(–1800) m

Discussion

Of conservation concern.

Chaenactis cusickii is known from Malheur County, Oregon, and adjacent Owyhee and Canyon counties, Idaho. Its relationship to other species is obscure.

Lower Taxa

None.

... more about "Chaenactis cusickii"
James D. Morefield +
A. Gray in A. Gray et al. +
Morning brides +  and Cusick’s pincushion +
Idaho +  and Oreg. +
700–1300(–1800) m +
Light-colored shrink-swell clay soils from volcanic ash and tuff, semiarid shrublands +
Flowering late Apr–Jun. +
in A. Gray et al., Syn. Fl. N. Amer. ed. +
moseley1994a +
Endemic +  and Conservation concern +
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Chaenactis cusickii +
Chaenactis sect. Chaenactis +
species +