Flora of North America species comparison

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Chaenactis nevii

Chaenactis parishii
Chaenactis nevii

John Day pincushion, John Day's pincushion, Nevius' chaenactis

Parish chaenactis, Parish's chaenactis
Habit Plants 10–30 cm; proximal indument greenish to grayish, stipitate-glandular and, sometimes, sparsely arachnoid or villous. Subshrubs, (10–)20–40(–60) cm (not cespitose or matted); proximal indument (especially of stems) persistent, whitish, densely lanuginose or pannose.
Stems

mostly 1–3;

branches mainly distal.

mostly 5–15+, erect.
Leaves

basal (withering) and cauline, 2–5 cm;

largest blades ± elliptic, ± plane to 3-dimensional, not succulent, 1–2-pinnately lobed;

primary lobes mostly 3–8 pairs, ± remote, ultimate lobes ± plane to involute.

mostly cauline, (1–)2–5 cm;

largest blades lance-ovate or deltate, ± plane, 1-pinnately lobed;

lobes mostly 2–5 pairs, remote, ± plane.
Peduncles

1–6 cm, distally stipitate-glandular and, sometimes, ± arachnoid to villous.

ascending to erect, 2–8(–20) cm.
Involucres

± hemispheric to campanulate.

± obconic.
Florets

corollas bright yellow, 4–6.5 mm;

peripheral corollas ± erect, actinomorphic, scarcely enlarged.

Corollas

7–8.5 mm.
Phyllaries

longest 6–9 mm;

outer predominantly stipitate-glandular and, sometimes, ± arachnoid to villous in fruit, apices ± erect, acute, rigid.

longest 10–13 mm;

outer predominantly arachnoid to closely lanuginose (sparsely, if at all, stipitate-glandular), apices ± squarrose, pliant.
Heads

mostly 3–9 per stem.

mostly 1–3 per stem.
Cypselae

3.5–6 mm (compressed);

pappi 0 or coroniform (of ± 10 scales, longest 0.1–0.5 mm).

4–7 mm;

pappi: longest scales 6–8 mm.
2n

= 12.

= 12.

Chaenactis nevii

Chaenactis parishii
Phenology Flowering late Apr–mid July. Flowering May–Jul.
Habitat Nearly barren, heavy clay soils from volcanic ash and tuff, sometimes disturbed or moist sites Open rocky to sandy soils in low montane chaparral
Elevation 400–1000 m (1300–3300 ft) 1300–2500 m (4300–8200 ft)
Distribution
from FNA
OR
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; Mexico (Baja California)
[BONAP county map]
Discussion

Chaenactis nevii is known from the John Day Basin area in Gilliam, Grant, Jefferson, Wasco, and Wheeler counties. This odd and isolated species combines traits of C. artemisiifolia (sect. Acarphaea) and C. glabriuscula, and might be descended from their common ancestor.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Of conservation concern.

Chaenactis parishii is sometimes cultivated in rock gardens. It is known from small, isolated populations in the higher Peninsular Ranges of Riverside and San Diego counties and adjacent Baja California. Chaenactis parishii and C. suffrutescens form a species pair well marked by the (usually) subshrubby habit, proximal indument persistent, white, felty, heads relatively large, and largest leaf blades lance-ovate to deltate.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 21, p. 411. FNA vol. 21, p. 404.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Chaenactis > sect. Chaenactis Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Chaenactis > sect. Macrocarphus
Sibling taxa
C. alpigena, C. artemisiifolia, C. carphoclinia, C. cusickii, C. douglasii, C. evermannii, C. fremontii, C. glabriuscula, C. macrantha, C. nevadensis, C. parishii, C. santolinoides, C. stevioides, C. suffrutescens, C. thompsonii, C. xantiana
C. alpigena, C. artemisiifolia, C. carphoclinia, C. cusickii, C. douglasii, C. evermannii, C. fremontii, C. glabriuscula, C. macrantha, C. nevadensis, C. nevii, C. santolinoides, C. stevioides, C. suffrutescens, C. thompsonii, C. xantiana
Name authority A. Gray: Proc. Amer Acad. Arts 19: 30. (1883) A. Gray: Proc. Amer. Acad. Arts 20: 299. (1885)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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