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lesser baby-innocence, small-flower tonella

Habit Annuals 5–37 cm.
Stems

ascending to erect, branched, sometimes simple, glabrous, sometimes minutely pubescent distally.

Leaves

petiole 0–15 mm;

proximal cauline leaves simple, margins usually crenate, medial cauline leaves tripartite, segments narrowly elliptic to lanceolate or linear, margins entire or serrate;

surfaces sparsely pilose adaxially, abaxially along midvein, and along margins, sometimes glabrous.

Racemes

flowers 1–3 per node;

bracts elliptic to lanceolate or deeply tripartite, segments narrowly elliptic to lanceolate, margins entire or crenate to serrate.

Pedicels

8–16 mm, sparsely glandular-hairy distally, sometimes glabrous or glabrate.

Flowers

calyx subrotate to campanulate, lobes triangular to oblong, 0.5–1.5 × 0.4–1 mm;

lateral lobes of abaxial lip not closely associated with medial lobe, widely spreading and closely associated with lobes of adaxial lip;

corolla 2–2.5 × 2–4 mm;

style 1.5–2.5 mm.

Capsules

1.5–3 × 1.5–2 mm.

Seeds

2, 1.6–2 × 0.8–1 mm.

Tonella tenella

Phenology Flowering Mar–Jun.
Habitat Moist, shaded canyons, moist open coniferous and deciduous forests, talus slopes.
Elevation 20–1600 m. (100–5200 ft.)
Distribution
from FNA
CA; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Tonella tenella occurs from San Benito County, California, and the High Sierra Nevada north to Washington mostly in the Cascade and Coast ranges but extending eastward through the Columbia River Gorge. Disjunct populations occur in central Oregon, and on Saltspring Island and Mount Tzouhalmen on Vancouver Island in southwestern British Columbia.

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

Source FNA vol. 17, p. 257.
Parent taxa Plantaginaceae > Tonella
Sibling taxa
T. floribunda
Synonyms Collinsia tenella
Name authority (Bentham ex A. de Candolle) A. Heller: Muhlenbergia 1: 5. (1900)
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