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Vascular Plants of California
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Acmispon argophyllus var. niveus

Higher Taxonomy
Family: Fabaceae (Leguminosae)View DescriptionDichotomous Key
Habit: Annual to tree. Leaf: generally alternate, generally compound, generally stipuled, generally entire, pinnately veined Inflorescence: generally raceme, spike, umbel or head; or flowers 1--few in axils. Flower: generally bisexual, generally bilateral; hypanthium 0 or flat to tubular; sepals generally 5, generally fused; petals generally 5, free, fused, or lower 2 +- united into keel (see 3, Key to Groups, for banner, wings); stamens 10 or many (or [1], 5, 6, 7, 9), free or fused or 10 with 9 filaments at least partly fused, 1 (uppermost) free; pistil 1, ovary superior, generally 1-chambered, ovules 1--many, style, stigma 1. Fruit: legume, including a stalk-like base (above receptacle) or not. Seed: 1--many, often +- reniform, generally hard, smooth.
Genera In Family: +- 730 genera, 19400 species: worldwide; with grasses, requisite in agriculture, most natural ecosystems. Many cultivated, most importantly Arachis, peanut; Glycine, soybean; Phaseolus, beans; Medicago, alfalfa; Trifolium, clovers; many orns. Note: Unless stated otherwise, fruit length including stalk-like base, number of 2° leaflets is per 1° leaflet. Upper suture of fruit adaxial, lower abaxial. Anthyllis vulneraria L. evidently a waif, a contaminant of legume seed from Europe. Laburnum anagyroides Medik., collected on Mount St. Helena in 1987, may be naturalized. Ceratonia siliqua L., carob tree (Group 2), differs from Gleditsia triacanthos L. in having evergreen (vs deciduous) leaves that are 1-pinnate (vs 1-pinnate on spurs on old stems, 2-pinnate on new stems) with 2--5(8) (vs 7--17) 1° leaflets, commonly cultivated, now naturalized in southern California. Aeschynomene rudis Benth. , Halimodendron halodendron (Pall.) Voss (possibly extirpated), Lens culinaris Medik. are agricultural weeds. Caragana arborescens Lam. only cult. Ononis alopecuroides L. , Sphaerophysa salsula (Pall.) DC. all evidently extirpated. Cercidium moved to Parkinsonia; Chamaecytisus to Cytisus; Psoralidium lanceolatum to Ladeania.
eFlora Treatment Author: Martin F. Wojciechowski, except as noted
Scientific Editor: Martin F. Wojciechowski, Thomas J. Rosatti.
Genus: AcmisponView DescriptionDichotomous Key

Habit: Annual, perennial herb, shrub, unarmed. Leaf: generally odd-1-pinnate (or +- palmately compound, rarely some or most simple); stipules often gland-like, bump-like, or conic, often not apparent; leaflets 3--9, generally irregularly arranged, lowest not stipular in position. Inflorescence: umbel or 1--2-flowered, axillary, generally peduncled, often bracted. Flower: corolla generally yellow (white, pink), fading darker; 9 filaments fused, 1 free. Fruit: dehiscent or not, exserted from calyx or not, ovoid to oblong, +- beaked. Seed: 1--several.
Species In Genus: +- 23 species: southwestern Canada, western United States, Mexico, 1 sp. in Chile. Etymology: (Greek acme, point, apex, probably for the hooked-tipped fruit) Note: Intermediates may be hybrids.
Unabridged Note: Pollen has 4(7) apertures.
eFlora Treatment Author: Luc Brouillet
Reference: Brouillet 2008 J Bot Res Inst Texas 2:387--394
Unabridged Reference: Isely 1981 Mem New York Bot Gard 25:128--206; Sokoloff 2000 Ann Bot Fenn 37:125--131
Species: Acmispon argophyllusView Description 

Habit: Perennial herb, +- woody or not, gray or silvery-silky with fine, straight, ultimately wavy or tangled hairs 0.2--0.4 mm. Stem: prostrate to erect, 1--6(10+) dm. Leaf: irregularly pinnate to +- palmate; stipules gland-like; leaflets 3--7, 6--12 mm, obovate to lance-elliptic, hairs generally obscuring surface. Inflorescence: head-like, 4--15(20)-flowered, peduncle +- 0 or 1--3(10) mm, bracted or not. Flower: calyx 4--8 mm, lobes +- <= tube, densely shaggy-hairy; corolla 6--12 mm, wings +- = keel, stigma glabrous. Fruit: indehiscent, horned, included or +- exserted (except beak), half-ovate, +- curved, generally not flat, beak curved, 2--3 mm. Seed: generally 1(2). Chromosomes: 2n=14.
Note: Major varieties geographically distinct; mainland varieties intergrade with related species.
Acmispon argophyllus var. niveus (Greene) Brouillet
Habit: Plant +- woody, silky. Stem: generally ascending. Leaf: not overlapping. Inflorescence: < 1 cm wide, 4--15-flowered, +- sessile, densely crowded at stem tips. Flower: calyx lobes 2.5--5 mm; corolla 6--10 mm.
Ecology: Rocky slopes, dry riverbeds; Elevation: < 300 m. Bioregional Distribution: n ChI (Santa Cruz Island). Flowering Time: Mar--Jun
Synonyms: Lotus argophyllus (A. Gray) Greene subsp. niveus (Greene) Munz; Lotus argophyllus var. niveus (Greene) Ottley
Jepson eFlora Author: Luc Brouillet
Reference: Brouillet 2008 J Bot Res Inst Texas 2:387--394
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

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Citation for this treatment: Luc Brouillet 2012, Acmispon argophyllus var. niveus, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on June 23, 2021.

Citation for the whole project: Jepson Flora Project (eds.) 2021, Jepson eFlora,, accessed on June 23, 2021.

Acmispon argophyllus var. niveus
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© 2009 Gary A. Monroe
Acmispon argophyllus var. niveus
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© 2014 Steve Matson
Acmispon argophyllus var. niveus
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© 2014 Steve Matson
Acmispon argophyllus var. niveus
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© 2014 Steve Matson
Acmispon argophyllus var. niveus
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© 2017 John Game
Acmispon argophyllus var. niveus
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© 2009 Keir Morse

More photos of Acmispon argophyllus var. niveus in CalPhotos

Geographic subdivisions for Acmispon argophyllus var. niveus:
n ChI (Santa Cruz Island).
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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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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).