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Vascular Plants of California
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Gayophytum racemosum


Higher Taxonomy
Family: OnagraceaeView DescriptionDichotomous Key
Common Name: EVENING-PRIMROSE FAMILY
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 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.
Species In Genus: +- 9 species: western North America, 2 South America. 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
Gayophytum racemosum Torr. & A. Gray
NATIVE
Stem: < 40 cm; branches generally proximal, not forked, 2° branches generally many. Leaf: 1--2.5 cm, not much reduced distally on stem. Inflorescence: 1st flower 1--3 nodes distal to base. Flower: petals 1.3--1.8 mm; larger stamens 0.8--1.5 mm; ovary hairy or not. Fruit: 10--15 mm, > pedicel, flat, +- grooved along midline, smooth or slightly knobby; lateral 2 valves not attached, wider. Seed: 10--35, appressed or above ascending, +- opposite, glabrous or densely puberulent. Chromosomes: 2n=28.
Ecology: Wet meadows, drying margins; Elevation: 1000--4000 m. Bioregional Distribution: CaRH, SNH, Teh, WTR, Wrn; Distribution Outside California: to Washington, Alberta, Colorado. Flowering Time: May--Oct Note: Probably from hybrids between Gayophytum decipiens, Gayophytum humile.
Jepson eFlora Author: Harlan Lewis
Unabridged Reference: Lewis & Szweykowski 1964 Brittonia 16:343--391
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Citation for this treatment: Harlan Lewis 2012, Gayophytum racemosum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=26547, accessed on May 25, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on May 25, 2019.

Gayophytum racemosum
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© 2019 Barry Breckling

More photos of Gayophytum racemosum in CalPhotos



Geographic subdivisions for Gayophytum racemosum:
CaRH, SNH, Teh, WTR, Wrn
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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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Duplicates counted once; synonyms included.
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Blue line denotes eFlora flowering time.