Orthocarpus luteus Nutt.
yellow owl-clover (yellow owl's-clover)
Orobanchaceae (Broom-rape family)
(Previously in Scrophulariaceae)

Introduction to Vascular Plants

Photograph

© Sharon E. Godkin     (Photo ID #71025)


Map

E-Flora BC Static Map

Distribution of Orthocarpus luteus
Click here to view the full interactive map and legend

Species Information

General:
Annual herb; stems erect, 10-40 cm tall, slender, simple or rarely few-branched above, spreading-hairy, often also glandular-hairy above, yellow-green sometimes becoming purple-tinged.
Leaves:
Alternate, unstalked, linear to narrowly lanceolate, 1.5-4 cm long, dark green, short-spreading-hairy, usually entire, sometimes the upper 3-cleft, the upper leaves passing gradually into the wider, 3-lobed bracts of the inflorescence.
Flowers:
Inflorescence a dense, ultimately elongate, prominently bracted, densely glandular-hairy, terminal spike 5-20 cm long, the bracts dark green, glandular-hairy, 10-15 mm long, differing gradually from the leaves, 3-lobed, the 2 lateral lobes small, divergent, about half as long as the narrowly egg-shaped middle lobe; corollas golden-yellow, minutely hairy, 9-15 mm long, exserted from the bracts, tubular, about equally 2-lipped, the upper lip beaked and minutely hooked, the lower lip swollen, pouched, minutely 3-toothed; calyces tubular, 5-8 mm long, green, glandular-hairy, subequally 4-lobed; stamens 4.
Fruits:
Capsules, ellipsoid, 5-7 mm long; seeds 20 to 35, about 1 mm long, with tight-fitting, netted, wrinkled coats.

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

USDA Species Characteristics

Flower Colour:
Yellow
Blooming Period:
Early Summer
Fruit/Seed characteristics:
Colour: Brown
Present over the Summer
Source:  The USDA

Ecology

Ecological Framework for Orthocarpus luteus

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Avg

Min

Max

Elevation (metres)
953 475 2290
Slope Gradient (%)
8 0 62

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

236 9 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 1 6
Modal Nutrient Regime
Class
C
# of field plots
 species was recorded in:
183
Modal BEC Zone Class
IDF

All BEC Zones (# of stations/zone) species was recorded in

BG(47), ESSF(2), ICH(1), IDF(102), MS(4), PP(22)

Habitat and Range

Dry to mesic meadows, grasslands and shrublands in the steppe and montane zones; infrequent in BC east of the Coast-Cascade Mountains and S of 56degreeN; E to ON and S to MN, NE, NM, AZ and CA.

SourceThe Illustrated Flora of British Columbia