Chylismia munzii
Onagraceae subfam. onagroideae
Munz's evening primrose
several, 8–50 cm.
primarily in basal rosette and also cauline, 1.5–20 × 0.5–3 cm;
petiole 0.5–5 cm;
blade pinnately lobed, terminal lobe ovate to narrowly ovate, 1.3–6 × 0.6–3 cm, margins denticulate, brownish oil cells lining veins abaxially.
stipules present or absent.
nodding, not congested, elongating in mature bud.
opening at sunrise;
buds with or without subapical free tips;
floral tube orange-brown inside, 2–3 mm, villous inside;
sepals 4–7 mm;
petals bright yellow, with red dots near base, fading pale yellow or yellowish orange, 3–10 mm;
stamens subequal, filaments 4–8 mm, anthers 3–6 mm, ciliate;
style 8–18 mm, stigma exserted beyond anthers at anthesis.
floral tube present or, rarely, absent;
sepals 2 or 4 (very rarely 3), deciduous with floral tube, petals, and stamens;
petals yellow, white, pink, red, rarely in combination.
widely spreading, becoming sharply reflexed, clavate, 8–24 mm;
pedicel 8–28 mm.
0.8–1.6 mm.
= 14.
Chylismia munzii
Onagraceae subfam. onagroideae
Chylismia munzii is known from middle elevations in the mountains at the north end, eastward from, and south of Death Valley, from Saline Valley and the Grapevine Mountains, Inyo County, California, and Yucca Flat, Nye County, Nevada, southward to the Kingston Range, San Bernardino County, California.P. H. Raven (1962, 1969) determined this species to be self-incompatible. It sometimes hybridizes with C. brevipes subsp. brevipes and C. claviformis subsp. aurantiaca.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Genera 21, species 582 (16 genera, 246 species in the flora).
Onagroideae encompass the main lineage of the family, after the early branching of Ludwigia (R. A. Levin et al. 2003, 2004). This large and diverse lineage is distinguished by the presence of a floral tube beyond the apex of the ovary; sepals deciduous with the floral tube, petals, and stamens; pollen shed in monads (or tetrads in Chylismia sect. Lignothera and all but one species of Epilobium); ovular vascular system exclusively transseptal (R. H. Eyde 1981); ovule archesporium multicellular (H. Tobe and P. H. Raven 1996); and change in base chromosome number from x = 8 in Ludwigia to x = 10 or x = 11 at the base of Onagroideae (Raven 1979; Levin et al. 2003). Molecular work (Levin et al. 2003, 2004) substantially supports the traditional tribal classification (P. A. Munz 1965; Raven 1979, 1988); tribes are recognized to delimit major branches within the phylogeny of Onagroideae, where the branches comprise strongly supported monophyletic groups of one or more genera.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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