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Eschscholzia minutiflora subsp. twisselmannii

RED ROCK POPPY


Higher Taxonomy
Family: PapaveraceaeView DescriptionDichotomous Key
Common Name: POPPY FAMILY
Habit: Annual to small tree; sap colorless, yellow, orange, red, or white. Leaf: basal, cauline, or both, simple and entire, toothed, or lobed, or 1--3-pinnate-dissected or compound; cauline generally alternate; stipules 0. Inflorescence: terminal, 1-flowered or cyme, raceme, or panicle; bracts generally present. Flower: bisexual, radial, bilateral, or biradial; sepals 2--3, shed after flower; petals generally 2 × sepals in number; stamens generally many; ovary 1, superior, chamber 1, style 0 or 1, stigmas or lobes 2--many, ovules few to many. Fruit: capsule, dehiscent by valves or pores, +- nut, or breaking transversely into 1-seeded, indehiscent units. Seed: fleshy appendage generally 0.
Genera In Family: 25--30 genera, 200 species: northern temperate, northern tropics; some cultivated (Papaver, Eschscholzia, Hunnemannia), source of opiates. Note: Stylomecon moved to Papaver. Corydalis, Dicentra, Fumaria in Fumariaceae in FNANM, elsewhere. Glaucium flavum Crantz is a waif. According to FNANM (3:300--301), Hunnemannia fumariifolia Sweet (+- like Eschscholzia except sepals free) an occasional waif in California, but documentation evidently lacking. Fleshy appendage of seed sometimes for dispersal by ants.
eFlora Treatment Author: Gary L. Hannan & Curtis Clark, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: EschscholziaView DescriptionDichotomous Key

Habit: Annual, perennial herb; sap colorless or orange. Leaf: basal or basal and cauline, 1--4-ternate-dissected, segments narrow to wide. Inflorescence: cyme, 1--many-flowered. Flower: receptacle funnel-shaped, tip cupped around ovary base, outer receptacle rim occasionally spreading; sepals 2, fused, shed as unit at flower; petals generally 4 (except doubled flowers), free, obovate or wedge-shaped, generally yellow to orange (white or pink), shed after flower leaving crown-like membrane (inner receptacle rim); stamens 8--many, free; carpels 2, style 0, stigma lobes 4, spreading, linear. Fruit: oblong, dehiscent from base. Seed: many, 1--2 mm, round to ovate, net-ridged, prominent-discontinuous-ridged, or minutely pitted, tan, brown, or black.
Etymology: (J.F.G. von Eschscholtz, Russian surgeon, botanist, 1793--1831)
eFlora Treatment Author: Shannon M. Still, Gary Hannan & Curtis Clark
Species: Eschscholzia minutifloraView Description 


Habit: Annual, erect or spreading, 5--35 cm, glabrous, gray- or blue-glaucous. Leaf: segments short, generally obtuse, entire to shallowly notched; distalmost cauline leaves with > 8 segments. Inflorescence: 1--many-flowered, each pedicel subtended by a leaf. Flower: bud nodding, short-pointed with tip generally < 1/4 bud, glabrous, occasionally glaucous; receptacle obconic; petals 3--26 mm, yellow, base occasionally orange-spotted. Fruit: 2.4--8 cm. Seed: 1--1.4 mm wide, generally oblong to elliptic, net-ridged, brown to black. Chromosomes: 2n=12,24,36.
Note: The three subspecies recognized here co-occur and warrant elevation to species rank.
Eschscholzia minutiflora S. Watson subsp. twisselmannii C. Clark & M. Faull
NATIVE
Habit: Annual, spreading to erect, 10--25 cm, glabrous, gray- or blue-glaucous. Flower: bud 5--10 mm; petals 10--20 mm, yellow. Fruit: 2.4--4.5 cm. Chromosomes: 2n=12.
Ecology: Desert washes, flats, slopes, generally on rhyolite-influenced substrates; Elevation: < 2600 m. Bioregional Distribution: w DMoj. Flowering Time: Feb--May
Jepson eFlora Author: Shannon M. Still, Gary Hannan & Curtis Clark
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Citation for this treatment: Shannon M. Still, Gary Hannan & Curtis Clark 2023, Eschscholzia minutiflora subsp. twisselmannii, in Jepson Flora Project (eds.) Jepson eFlora, Revision 12, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=50500, accessed on December 03, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on December 03, 2024.

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Geographic subdivisions for Eschscholzia minutiflora subsp. twisselmannii:
w DMoj.
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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 occurrence).






 

Data provided by the participants of the  Consortium of California Herbaria.

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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.
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CCH collections by month Flowering-Fruiting Monthly Counts

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).