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Vascular Plants of California
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Gayophytum diffusum subsp. parviflorum

Higher Taxonomy
Family: OnagraceaeView DescriptionDichotomous Key
Habit: Annual to perennial herb (to tree). Leaf: cauline or basal, alternate, opposite, or whorled, generally simple and toothed (to pinnately compound); stipules 0 or generally deciduous. Inflorescence: spike, raceme, panicle, or flowers 1 in axils; bracted. Flower: generally bisexual, generally radial, often opening at either dawn or dusk; hypanthium generally prolonged beyond ovary (measured from ovary tip to sepal base); sepals 4(2--7); petals 4(2--7, rarely 0), often fading darker; stamens 2 × or = sepals in number, anthers 2-chambered, opening lengthwise, pollen interconnected by threads; ovary inferior, chambers generally as many as sepals (sometimes becoming 1), placentas axile or parietal, ovules 1--many per chamber, style 1, stigma 4-lobed (or lobes as many as sepals), club-shaped, spheric, or hemispheric. Fruit: capsule, loculicidal (sometimes berry or indehiscent and nut-like). Seed: sometimes winged or hair-tufted.
Genera In Family: 22 genera, +- 657 species: worldwide, especially western North America; many cultivated (Clarkia, Epilobium, Fuchsia, Oenothera). Note: Gaura moved to Oenothera. Fuchsia magellanica Lam. naturalized in northern California.
eFlora Treatment Author: Warren L. Wagner & Peter C. Hoch, family description, key to genera, treatment of genera by Warren L. Wagner, except as noted
Scientific Editor: Robert W. Patterson, Bruce G. Baldwin.
Genus: GayophytumView DescriptionDichotomous Key

Habit: Annual. Stem: generally erect, < 1 m, slender; hairs 0 to dense, rarely glandular. Leaf: cauline, alternate (or +- opposite near base), petioled or not, narrow-lanceolate, entire. Inflorescence: flowers axillary, pedicelled or not, opening at dawn. Flower: hypanthium inconspicuous; sepals 4, staying fused in 2s or all coming free; petals 4, 0.5--8 mm, white, with 1--2 yellow or +- green spots at base, fading pink or red; stamens 8, those opposite sepals longer, pollen +- yellow; ovary chambers 2, stigma generally not exserted beyond anthers, generally touching them, generally +- spheric. Fruit: capsule, +- cylindric or flat; valves 4, generally all coming free, generally equal. Seed: few to many, generally all maturing, generally appressed to septum, alternate or +- opposite between chambers, in each chamber generally in 1 row and generally not overlapped, 0.5--2.3 mm, ovoid, glabrous or hairy, brown or gray mottled with brown; appendages 0.
Etymology: (C. Gay, French author of Flora of Chile, 1800--1873) Note: Self-fertile; taxa with petals < 3 mm self-pollinated.
eFlora Treatment Author: Harlan Lewis
Unabridged Reference: Lewis & Szweykowski 1964 Brittonia 16:343--391
Species: Gayophytum diffusumView Description 

Stem: < 60 cm; branches at base or not, generally forked distally. Leaf: 1--6 cm, generally reduced distally on stem. Inflorescence: 1st flower 1--20 nodes distal to base. Flower: ovary hairy. Fruit: 3--15 mm, sessile or generally > pedicel, cylindric, slightly to very knobby. Seed: 3--18, alternate or +- opposite, in each chamber occasionally in 2 rows and overlapped, glabrous to densely puberulent. Chromosomes: 2n=28.
Note: Complex from several 2n=14 species; subspecies may intergrade locally.
Gayophytum diffusum Torr. & A. Gray subsp. parviflorum H. Lewis & Szweyk.
Flower: petals 1.2--3 mm; larger stamens 0.9--2 mm; stigma not exserted beyond anthers, +- spheric. Fruit: seeds in each chamber occasionally in 2 rows and overlapped.
Ecology: Common. Open montane forest, sagebrush scrub; Elevation: 800--3700 m. Bioregional Distribution: NW, CaR, SN, TR, PR, GB. Flowering Time: May--Sep Note: Variable; most small-flowered plants assigned by Munz, others to Gayophytum nuttallii belong here; may occur with any taxon of genus.
Jepson eFlora Author: Harlan Lewis
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Gayophytum diffusum subsp. parviflorum

botanical illustration including Gayophytum diffusum subsp. parviflorum

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Citation for this treatment: Harlan Lewis 2012, Gayophytum diffusum subsp. parviflorum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on September 29, 2023.

Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora,, accessed on September 29, 2023.

Gayophytum diffusum subsp. parviflorum
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© 2021 Neal Kramer
Gayophytum diffusum subsp. parviflorum
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© 2012 Keir Morse
Gayophytum diffusum subsp. parviflorum
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© 2006 Steve Matson
Gayophytum diffusum subsp. parviflorum
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© 2021 Neal Kramer
Gayophytum diffusum subsp. parviflorum
click for enlargement
© 2021 Neal Kramer
Gayophytum diffusum subsp. parviflorum
click for enlargement
© 2006 Steve Matson

More photos of Gayophytum diffusum subsp. parviflorum in CalPhotos

Geographic subdivisions for Gayophytum diffusum subsp. parviflorum:
NW, CaR, SN, TR, PR, GB.
1. You can change the display of the base map layer control box in the upper right-hand corner.
2. County and Jepson Region polygons can be turned off and on using the check boxes.
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).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).