Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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James Henrickson

Annual to tree
Stem prostrate to erect
Leaves alternate or opposite, simple, generally entire, bract-like upward; stipules 0
Inflorescence: cymes, often arrayed ± in spikes or panicles; bracts 1–3 per flower, generally membranous-scarious, tip often short-pointed or spine-like
Flower generally small, uni- or bisexual, radial; sepals 0–5, fused at base or free, often ± scarious; petals 0; stamens 0–5, opposite sepals (staminodes sometimes alternating), filaments sometimes fused at base; ovary superior, 1-chambered, ovules 1–several, erect or pendent on ± basal stalks, styles 0–3, stigma head-like or 2–3-lobed
Fruit: utricle to circumscissile capsule
Seed lenticular to spheric, hard
Genera in family: ± 65 genera, ± 900 species: tropical, subtropical
Reference: [Robertson 1981 J Arnold Arbor 62:267–313]


Perennial in CA
Leaves opposite
Inflorescence: spike or panicle-like; bracts generally persistent
Flower bisexual; sepals 5, free, inner sometimes < outer, strongly or weakly 3-veined, fleshy to hardened at base, hairs 0 or ± straight; stamens (2–)5, filaments fused at base, generally alternate elongate, entire to branched staminodia; ovule pendent, style 1, short, stigma 0 or 2-lobed
Fruit indehiscent; wall membranous
Seed smooth
Species in genus: ± 170 species: generally tropical Am
Etymology: (Latin: alternate, from staminodia)


A. caracasana Kunth

Stem wavy-hairy, becoming glabrous
Leaves at a node often unequal; petioles 3–13 mm, narrowly winged, clasping; blades 5–18 mm wide, ± diamond-shaped to round, tip obtuse to acute
Inflorescence: spike, 6–7 mm wide, sessile; bracts 3–3.5 mm, entire, whitish, papery, midvein hairy
Flower: sepals unequal, outer 3.5–4.5 mm, ± widely lanceolate, not keeled, strongly 3-veined below, spine-tipped, inner 2.5 mm, ± linear, keeled, generally 1-veined, whitish, stiff, margins scarious; filaments 0.2–0.4 mm, slightly > staminodia
Ecology: Generally waste places
Elevation: < 150 m.
Bioregional distribution: South Coast
Distribution outside California: to se US, c Mexico, also Africa; native to C.America, S.America
Synonyms: A. pungens Kunth; A. repens (L.) Kuntze misapplied

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bioregional map for ALTERNANTHERA%20caracasana 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 Alternanthera caracasana
Retrieve dichotomous key for Alternanthera
Overlay Consortium of California Herbaria specimen data by county on this map
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