Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
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Duncan M. Porter

Herb, shrub, often armed; caudex present or not
Stem branched; nodes often angled, swollen
Leaves 1-compound, opposite; stipules persistent or deciduous; leaflets entire
Inflorescence: flowers 1–2 in axils
Flower bisexual; sepals 5, free, persistent or deciduous; petals 5, free, generally spreading, sometimes twisted and appearing propeller-like; stamens 10, sometimes appendaged on inside base; ovary superior, chambers 5–10, ovules 1–several per chamber, placentas axile
Fruit: capsule or splitting into 5–10 nutlets
Genera in family: 26 genera, ± 250 species: widespread especially in warm, dry regions; some cultivated (Guaiacum, lignum vitae; Peganum, harmal (NOXIOUS and illegal); Tribulus, caltrop (pernicious)). Peganum harmala L. has been reported as a pernicious weed near Daggett, San Bernardino Co
Reference: [Porter 1972 J Arnold Arbor 53:531–552]


Perennial, shrub
Stem < 1 m, spreading, angled or ridged
Leaf palmately compound; stipules stiff, spine-tipped; leaflets 3, spine-tipped, terminal largest
Inflorescence: flowers solitary in axils
Flower: sepals deciduous; petals clawed, twisted, propeller-like, purple to pink, deciduous
Fruit: capsule, deeply 5-lobed, obovoid, ± septicidal; style persistent; peduncle reflexed
Seed 1 per chamber
Species in genus: ± 18 species: sw North America, Chile, Medit, sw Africa
Etymology: (G.C. Fagon, French physician to Louis XIV, 1638–1718)


F. pachyacantha Rydb.

Perennial; caudex woody
Leaf: leaflets < 25 mm, ± = or > petiole, < 9 mm wide
Flower ± 1.5 cm wide
Fruit 5 mm wide, hairy, generally with some glands; style 2–3 mm, not or barely wider at base
Ecology: Flat, sandy or rocky habitats
Elevation: 0–500 m.
Bioregional distribution: Sonoran Desert
Distribution outside California: to sw Arizona, Mexico
Flowering time: Mar–May, Nov–Jan
Synonyms: F. californica Benth. var. glutinosa Vail
Horticultural information: TRY.

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bioregional map for FAGONIA%20pachyacantha being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Fagonia pachyacantha
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