Collinsia corymbosa


Gartenflora 1868: 33, plate 568. 1868.

Common names: Round-headed Chinese-houses
EndemicConservation concern
Treatment appears in FNA Volume 17. Treatment on page 71. Mentioned on page 64, 73.

Annuals 5–25 cm. Stems decumbent. Leaf blades lanceolate to ovate, margins crenate, abaxial surface glabrous, adaxial subglabrous or finely gray-hairy. Inflorescences sparsely and finely glandular; whorl 1 per branch; nodes (1–)3–10-flowered; flowers crowded; distalmost bracts ovate, 5–9 mm. Pedicels ascending to spreading, shorter than calyx, not or scarcely visible. Flowers: calyx lobes oblong to ovate, surpassing capsule, ape× rounded; corolla usually whitish, 14–22 mm, wings sparsely and finely glandular, not hairy; banner length 0.1–0.3(–0.4) times wings, lobe base without folds, reflexed portion 1 mm, shorter than basal portion, brownish, not red-banded; stamens: filaments hairy, basal spur 0. Seeds 8–16, oblong to oval, 2–2.5 mm, margins thickened, inrolled. 2n = 14.

Phenology: Flowering Apr–Jun.
Habitat: Coastal sand dunes.
Elevation: 0–20 m.


Collinsia corymbosa is known from Mendocino County. Specimens from other sites identified as C. corymbosa are C. bartsiifolia var. hirsuta. A phylogenetic study using DNA showed evidence of a close relationship between C. corymbosa and C. bartsiifolia (B. G. Baldwin et al. 2011).

Selected References


Lower Taxa