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

golden-tongue owl-clover, yellow owl's-clover, yellow owl-clover

Habit Annuals 8–35 cm. Annuals 10–40(–60) cm.
Stems

erect or ascending, pilose and puberulent.

erect to ascending, pubescent and pilose.

Leaves

10–50 mm;

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

15–50 mm;

blade: proximal margins entire, distal entire or 3-lobed.

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–)5–20 cm;

bracts 10–20 mm, margins 3-lobed in distal 1/2, proximal resembling distal leaves, midlobe green distally, triangular, 2–3 mm wide, apex acuminate, not cuspidate, lateral lobes narrowly lanceolate.

Pedicels

1–2 mm.

0 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 5–8 mm;

corolla 10–15 mm, longer than bracts, abaxial lip inflated, lobes 3, rounded, adaxial lip golden yellow, 2–4 mm, equal to abaxial, glandular-puberulent, tip minutely hooked, not bearded.

Capsules

6–7 mm, apex acute.

5–7 mm, apex retuse.

Seeds

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

20–35, yellow or dark brown, ovoid, 1.2–1.5 mm, reticulate, longitudinally ridged.

2n

= 28.

= 28.

Orthocarpus tenuifolius

Orthocarpus luteus

Phenology Flowering May–Aug. Flowering Jun–Sep.
Habitat Moist fields, grasslands, rocky slopes. Grasslands, sagebrush scrub, mountain meadows, disturbed grounds.
Elevation (300–)600–2500 m. ((1000–)2000–8200 ft.) (200–)400–3000 m. ((700–)1300–9800 ft.)
Distribution
from FNA
ID; MT; OR; WA; WY; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; CO; ID; MN; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; ON; SK
[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.)

Orthocarpus luteus can be distinguished by its golden yellow corollas, with minutely hooked tips on adaxial lips. The Ontario population is not native. The Blackfeet used the leaves of O. luteus to dye skins, hair, and feathers red to reddish brown (A. Johnston 1987).

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

Source FNA vol. 17, p. 683. FNA vol. 17, p. 683.
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. imbricatus, O. pachystachyus, O. purpureoalbus, O. tenuifolius, O. tolmiei
Synonyms Bartsia tenuifolia O. strictus
Name authority (Pursh) Bentham: Scroph. Ind., 12. (1835) Nuttall: Gen. N. Amer. Pl. 2: 57. (1818)
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