Chylismia scapoidea subsp. utahensis

(P. H. Raven) W. L. Wagner & Hoch

Syst. Bot. Monogr. 83: 208. 2007.

Basionym: Oenothera scapoidea subsp. utahensis P. H. Raven Univ. Calif. Publ. Bot. 34: 96. 1962
Synonyms: Camissonia scapoidea subsp. utahensis (P. H. Raven) P. H. Raven C. scapoidea var. utahensis (P. H. Raven) S. L. Welsh
Treatment appears in FNA Volume 10.

Leaves: blade usually pinnately lobed, terminal lobe narrowly ovate to ovate or, sometimes, elliptic, 2–5 × 1–2.8 cm, margins dentate, oil cells on abaxial surface conspicuous, usually dark brown. Flowers: petals 4–5.5(–8) mm. Capsules 16–38 mm.


Phenology: Flowering May–Jun.
Habitat: Dry rocky slopes, flats, with Atriplex and Ericameria.
Elevation: 1200–1700 m.

Discussion

Subspecies utahensis is known from extreme northeastern Nevada (Elko County) and western Utah. P. H. Raven (1962, 1969) described this subspecies for populations that are somewhat intermediate between Chylismia walkeri subsp. tortilis and C. scapoidea subsp. brachycarpa, suggesting that this entity perhaps developed via hybridization between them. The ranges of the two putative parents heavily overlap that of subsp. utahensis. A. Cronquist et al. (1997c) combined subsp. brachycarpa and subsp. utahensis.

Selected References

None.

Lower Taxa

None.
Warren L. Wagner +
(P. H. Raven) W. L. Wagner & Hoch +
Oenothera scapoidea subsp. utahensis +
Nev. +  and Utah. +
1200–1700 m. +
Dry rocky slopes, flats, with Atriplex and Ericameria. +
Flowering May–Jun. +
Syst. Bot. Monogr. +
Camissonia scapoidea subsp. utahensis +  and C. scapoidea var. utahensis +
Chylismia scapoidea subsp. utahensis +
Chylismia scapoidea +
subspecies +