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Castilleja pilosa

Higher Taxonomy
Family: OrobanchaceaeView DescriptionDichotomous Key

Habit: Annual, perennial herb, shrub; often glandular; root-parasites, roots modified into absorptive structures. Stem: generally round in ×-section. Leaf: generally simple, generally alternate, reduced to +- fleshy scales in non-green plants lacking chlorophyll; stipules generally 0. Inflorescence: spike to panicle, generally bracted, or flowers 1--2 in axils. Flower: bisexual; calyx lobes 0--5; corolla generally strongly bilateral, generally 2-lipped (upper lip generally 2-lobed, lower lip generally 3-lobed), abaxial lobes outside other lobes in bud; stamens epipetalous, 4 in 2 pairs (sometimes 1 pair sterile), additional staminode 0(1), anther sacs unequal; ovary superior, chambers 1--2, placentas 2--4, parietal, style 1, stigma lobes 0 or 2. Fruit: capsule, generally +- ovoid, loculicidal, valves 2--4. Seed: many, small, angled; surface smooth or netted.
Genera In Family: 99 genera, 2060 species: worldwide, especially northern temperate and Africa. Note: High yield losses in many crops caused by Orobanche species in Africa, Mediterranean, Middle East, and eastern Europe.
eFlora Treatment Author: Margriet Wetherwax, except as noted
Scientific Editor: Robert Patterson, Bruce G. Baldwin.
Genus: CastillejaView DescriptionDichotomous Key

Habit: Annual to subshrub, green. Leaf: sessile, entire to dissected. Inflorescence: spike-like; bracts becoming shorter, wider, more lobed than leaves, mature tips generally cream to red or green. Flower: calyx unequally 4-lobed, colored like bract tips; corolla upper 2 lip lobes fused, beak-like, tip open, lower lip reduced, 3-toothed to -pouched; stamens 4, anther sacs 2, unequal; stigma entire to 2-lobed, generally exserted. Fruit: +- asymmetric. Seed: generally +- brown, attached at base; coat netted, net-like walls ladder-like or not.
Species In Genus: +- 200 species: especially western North America. Etymology: (Domingo Castillejo, Spanish botanist, 1744--1793) Note: Hybridization and polyploidy common. Biologically consistent taxa difficult to define. Castilleja chrymactis Pennell not in California, sole (1947) record a misidentified, incomplete specimen.
eFlora Treatment Author: Margriet Wetherwax, T.I. Chuang & Lawrence R. Heckard

Castilleja pilosa (S. Watson) Rydb.
Habit: Perennial herb 8--35 cm, often decumbent, spreading-stiff-hairy, nonglandular. Leaf: 10--50 mm, lance-linear; lobes 0--3. Inflorescence: 3--20 cm; bracts 10--30 mm, lobes 3--5, pale green or +- purple, white-margined, central lobe truncate or rounded (acute). Flower: calyx 10--20, subequally divided +- 1/2, lobes lance-linear; corolla 13--22 mm, beak 4--6 mm, pale yellow-green, lower lip 3--5 mm, pouches shallow; stigma +- exserted, dark. Fruit: 8--12 mm. Seed: +- 1 mm; coat deeply netted, tight-fitting, walls ladder-like. Chromosomes: 2n=24.
Ecology: Dry sagebrush scrub to alpine barrens; Elevation: 1200--3400 m. Bioregional Distribution: CaRH, SNH, GB; Distribution Outside California: to eastern Oregon, central Idaho, western Wyoming. Flowering Time: Jun--Aug Note: Highly variable, intergrades with Castilleja nana; needs further study.
Synonyms: Castilleja pilosa subsp. jusselii (Eastw.) Munz; Castilleja psittacina (Eastw.) Pennell
eFlora Treatment Author: Margriet Wetherwax, T.I. Chuang & Lawrence R. Heckard
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botanical illustration including Castilleja pilosa


Citation for this treatment: Margriet Wetherwax, T.I. Chuang & Lawrence R. Heckard 2016. Castilleja pilosa, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 29, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on April 29, 2016.

Castilleja pilosa var. steenensis
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© 2012 Gary A. Monroe
Castilleja pilosa var. steenensis
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© 2013 Gary A. Monroe
Castilleja pilosa
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© 2004 Steve Matson
Castilleja pilosa
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© 2009 Keir Morse
Castilleja pilosa var. pilosa
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© 2005 Christopher L. Christie
Castilleja pilosa
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© 2009 Keir Morse

More photos of Castilleja pilosa in CalPhotos

Geographic subdivisions for Castilleja pilosa:
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.