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Castilleja densiflora subsp. obispoensis

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
Species: Castilleja densifloraView Description 

Habit: Annual 10--40 cm, branches 0 or few from mid-stem, +- glabrous. Leaf: 20--80 mm, < 3 mm wide, lance-linear, lobes 0--3. Inflorescence: 3--25 cm, 2.5--4 cm wide; bracts 10--25 mm, tipped white or +- purple, lobes 3--5, linear. Flower: calyx divided 1/2 abaxially and on sides, 2/3 adaxially, lobes +- linear, tip wider; corolla 10--25 mm, yellow (cream), pink, or rose-purple, beak 5--6 mm, straight, puberulent, lower lip 4--5 mm, pouches 4--6 mm wide, 2--3 mm deep; filaments glabrous; stigma +- exserted, +- 2-lobed. Fruit: 7--10 mm. Seed: +- 0.5 mm; coat shallowly netted, loose-fitting. Chromosomes: 2n=24.
Note: Highly variable; many local forms; more study needed.

Castilleja densiflora subsp. obispoensis (D.D. Keck) T.I. Chuang & Heckard
Inflorescence: cream to pale yellow; bracts = flowers. Flower: calyx 8--20; corolla +- included, lower lip widened gradually, pouches longer than deep, teeth +- 2 mm.
Ecology: Coastal grassland; Elevation: < 400 m. Bioregional Distribution: s CCo (San Luis Obispo Co.). Flowering Time: Mar--Jun
Synonyms: Orthocarpus densiflorus Benth. var. obispoensis D.D. Keck
eFlora Treatment Author: Margriet Wetherwax, T.I. Chuang & Lawrence R. Heckard
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Castilleja densiflora subsp. gracilis
Next taxon: Castilleja exserta

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Citation for this treatment: Margriet Wetherwax, T.I. Chuang & Lawrence R. Heckard 2016. Castilleja densiflora subsp. obispoensis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 01, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 01, 2016.

Castilleja densiflora subsp. obispoensis
click for enlargement
© 2010 Aaron E. Sims
Castilleja densiflora subsp. obispoensis
click for enlargement
© 2010 Aaron E. Sims
Castilleja densiflora subsp. obispoensis
click for enlargement
© 2010 Aaron E. Sims
Castilleja densiflora subsp. obispoensis
click for enlargement
© 2010 Aaron E. Sims

More photos of Castilleja densiflora subsp. obispoensis in CalPhotos

Geographic subdivisions for Castilleja densiflora subsp. obispoensis:
s CCo (San Luis Obispo Co.).
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.