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narrow-leaf owl-clover, thin-leaf owl's-clover, thin-leaf owl-clover

imbricate owl's clover, mountain owl's-clover, mountain owl-clover

Habit Annuals 8–35 cm. Annuals (5–)10–35 cm.
Stems

erect or ascending, pilose and puberulent.

erect or ascending, puberulent to sparsely puberulent.

Leaves

10–50 mm;

blade: proximal margins entire, distal 3–7-lobed.

20–50 mm;

blade margins entire.

Inflorescences

racemes, 2–6 cm;

bracts 10–20 mm, margins 3–5-lobed in proximal 1/2, proximal not resembling distal leaves, midlobe purple-pink distally, ovate, 4–6 mm wide, apex obtuse, cuspidate, lateral lobes narrowly triangular.

spikes, 2–8 cm;

bracts 10–15 mm, margins 3-lobed in proximal 1/2, proximal not resembling distal leaves, midlobe purple-pink distally, obovate, 6–10 mm wide, apex obtuse, cuspidate, lateral lobes triangular.

Pedicels

1–2 mm.

0–1 mm.

Flowers

calyx 8–12 mm;

corolla 14–20 mm, equal to or slightly longer than bracts, abaxial lip inflated, lobes 3, triangular, adaxial lip purple-pink, 5 mm, 1 mm longer than abaxial, puberulent, tip notably hooked, not bearded.

calyx 5–7 mm;

corolla 10–15 mm, slightly longer than bracts, abaxial lip inflated, lobes 3, triangular, adaxial lip purple-pink, 3–4 mm, 0–0.5 mm longer than abaxial, puberulent, tip hooked, not bearded.

Capsules

6–7 mm, apex acute.

4–5 mm, apex retuse.

Seeds

15–20, dark brown, ovoid to reniform, 1–1.5 mm, shallowly reticulate, not ridged.

3–5, dark brown, reniform, 1.5–2 mm, reticulate, not ridged.

2n

= 28.

= 28.

Orthocarpus tenuifolius

Orthocarpus imbricatus

Phenology Flowering May–Aug. Flowering Jun–Sep.
Habitat Moist fields, grasslands, rocky slopes. Montane meadows, grassy or rocky slopes.
Elevation (300–)600–2500 m. ((1000–)2000–8200 ft.) 1100–2400 m. (3600–7900 ft.)
Distribution
from FNA
ID; MT; OR; WA; WY; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Orthocarpus tenuifolius is one of the plants first collected by Meriwether Lewis during the Corps of Discovery Expedition.

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

In northern California, Orthocarpus imbricatus is known from the Klamath, North Coast, and Cascade ranges.

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

Source FNA vol. 17, p. 683. FNA vol. 17, p. 682.
Parent taxa Orobanchaceae > Orthocarpus Orobanchaceae > Orthocarpus
Sibling taxa
O. barbatus, O. bracteosus, O. cuspidatus, O. imbricatus, O. luteus, O. pachystachyus, O. purpureoalbus, O. tolmiei
O. barbatus, O. bracteosus, O. cuspidatus, O. luteus, O. pachystachyus, O. purpureoalbus, O. tenuifolius, O. tolmiei
Synonyms Bartsia tenuifolia O. olympicus
Name authority (Pursh) Bentham: Scroph. Ind., 12. (1835) Torrey ex S. Watson: Botany (Fortieth Parallel), 458. (1871)
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