Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

OROBANCHACEAE

BROOM-RAPE FAMILY

Lawrence R. Heckard

Annual, perennial herb, non-green root-parasites; roots modified into absorptive structures; plant an erect, fleshy, mostly underground stem (peduncle) with terminal inflorescence
Leaf: true leaves 0
Inflorescence: spike, raceme, or panicle; bracts alternate, scale-like
Flower bisexual; calyx cylindric or cup-shaped, lobes 0–5, persistent; corolla ± 2-lipped, lobes generally 5; stamens 4, epipetalous in 2 pairs (sometimes a 5th vestigial); ovary superior, chamber 1, placentas generally 2–4, parietal, simple or lobed, stigma generally 2–4-lobed, generally bowl- to funnel-shaped
Fruit: capsule, loculicidal; valves 2–4
Seeds many, small, angled; surface netted
Genera in family: 14 genera, 200 species: especially n temp
Reference: [Thieret 1971 J Arnold Arbor 52:404–432]
Recent taxonomic note: Recently treated to include hemiparasitic genera of Scrophulariaceae (e.g., Castilleja, Cordylanthus, Orthocarpus, Pedicularis, Triphysaria [Olmstead et al. 2001 Mol Phylogen Evol 16:96–112]
.

BOSCHNIAKIA

GROUND-CONE

Perennial, glabrous
Stems generally simple, annual, 1–many from corm-like thickening surrounding host root
Inflorescence spike-like; bracts densely overlapping, ± ovate; pedicels generally < 2 mm; bractlets on pedicel 0–3, narrow
Flower: calyx cup-shaped, teeth 0–5 (variable on a plant), tip acute or tapered; corolla with ring of hairs in upper tube at base of stamens, upper lip entire or indented, lower lip 3-lobed; upper filament and anther hairy
Fruit 2–4-valved; placenta 1 per valve
Species in genus: 3 species: nw North America, ne Asia
Etymology: (Boschniaki, Russian botanist)
Reference: [Gilkey 1945 OR State Monogr Bot 9]

Native

B. hookeri Walp.

SMALL GROUND-CONE

Plant 7–12 cm
Inflorescence 3–6 cm, < 3 cm diam, purplish to pale yellow; lower bracts 10–12 mm, ovate to narrowly obovate, tip obtuse to acute
Flower: calyx cup 2–3 mm, teeth 2–4 mm, deltate; corolla 10–15 mm, generally pale, lips erect, 3–4 mm (upper > lower)
Seed ± 1.5 mm
Ecology: Open woods, shrubby places, generally on Gaultheria shallon
Elevation: < 300 m.
Bioregional distribution: Outer North Coast Ranges (1 site, Humboldt Co.), San Francisco Bay Area (Mount Tamalpais, Marin Co.)
Distribution outside California: to British Columbia
CA plants are among the most distinct from B. strobilacea in their small size and pale color.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for BOSCHNIAKIA%20hookeri being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Boschniakia hookeri
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