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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George Yatskievych

Annual, perennial herb, non-green root-parasite
Stem (actually a peduncle) fleshy, underground, generally unbranched, white or ± brown
Leaves scale-like, alternate
Inflorescence: panicle, spike, or head
Flower bisexual, ± radial; calyx lobes 4–10; corolla lobes 4–10; stamens as many as corolla lobes, epipetalous, included; ovary superior, chambers 10–32, placentas axile, style 1, stigma lobes 5–9
Fruit: capsule, circumscissile, hidden by persistent perianth
Seeds in a ring, 1 per chamber, ± reniform, flat, brown
Genera in family: 2 genera, 4 species: sw US to n South America, nowhere common; some historically harvested for food
Reference: [Yatskievych & Mason 1986 Syst Bot 11:531–548]


Stem < 1.5 m
Leaf 5–25 mm, linear to triangular, glandular
Flower 7–10 mm
Fruit ± circumscissile below middle
Species in genus: 3 species: s CA, w AZ, nw Mex
Etymology: (Greek: scale, from scaly stem)


P. arenarium Hook.

Stem 3–8 dm, 1–2 cm diam
Flower: calyx lobes linear to spoon-shaped; corolla lavender to bluish purple, margin white, exterior minutely puberulent; ovary chambers 10–20
Chromosomes: 2n=36
Ecology: Uncommon. Sandy soil, coastal dunes, chaparral, desert
Elevation: < 1900 m.
Bioregional distribution: Central Coast, South Coast, Peninsular Ranges, Desert
Distribution outside California: w Arizona, nw Mexico
Flowering time: Apr–Jul, Oct
Parasitic on Croton , Eriodictyon , various shrubby Asteraceae.

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bioregional map for PHOLISMA%20arenarium 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 Pholisma arenarium
Retrieve dichotomous key for Pholisma
Retrieve multiple-entry key (MEKA) for Pholisma
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
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