|University of California, Berkeley|
|Directory News Site Map Home|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Annual to tree, glandular or not. Leaf: simple to palmately or pinnately compound, generally alternate; stipules free to fused (0), persistent to deciduous. Inflorescence: cyme, raceme, panicle, cluster, or flowers 1; bractlets on pedicel ("pedicel bractlets") generally 0–3(many), subtended by bract or generally not. Flower: generally bisexual, radial; hypanthium free or fused to ovary, saucer- to funnel-shaped, subtending bractlets ("hypanthium bractlets") 0–5, alternate sepals; sepals generally 5; petals generally 5, free; stamens (0,1)5–many, anther pollen sacs generally 2; pistils (0)1–many, simple or compound, ovary superior to inferior, styles 1–5. Fruit: 1–many per flower, achene (fleshy-coated or not), follicle, drupe, or pome with generally papery core, occasionally drupe-like with 1–5 stones. Seed: generally 1–5 (per fruit, not per flower).
110 genera, ± 3000 species: worldwide, especially temperate; many cultivated for ornamental, fruit, especially Cotoneaster, Fragaria, Malus, Prunus, Pyracantha, Rosa, Rubus. [Potter et al. 2007 Plant Syst Evol 266:5–43] Number of teeth is per leaf or leaflet, not per side of leaf or leaflet, except in Drymocallis. —Scientific Editors: Daniel Potter, Thomas J. Rosatti.
Unabridged references: [Robertson 1974 J Arnold Arbor 55:303–332, 344–401, 611–662]
Key to Rosaceae
1 sp. (Diminutive of Poterium)
Unabridged references: [Kerr 2004 A phylogenetic and biogeographic analysis of Sanguisorbeae (Rosaceae), with emphasis on the Pleistocene radiation of the high Andean genus Polylepis. Ph.D. Dissertation Univ of Maryland.]
Annual, biennial, taprooted, nonglandular. Stem: generally ascending to erect, generally 10–70 cm. Leaf: alternate, odd-1-pinnately compound; basal withered at flower; largest cauline generally 3–12 cm; leaflets 4–7 per side, largest blade 5–20 mm, ± sessile, ± obovate-elliptic, lobes < 15, > 2/3 to midvein, linear. Inflorescence: spike, head-like, 5–35 mm, 5–10 mm wide, cylindric-ovoid, ± 10–50-flowered; peduncle 3–15 cm; pedicel bractlets 2, subtended by 1 bract, all 3 2–3 mm wide. Flower: bisexual; hypanthium urn-shaped, bractlets 0; sepals generally 4, 2–3 mm, ovate, green; petals 0; stamens generally 2, filaments thread-like; pistil 1, ovary superior, continuous to style at top, stigma ± bushy, exserted. Fruit: hypanthium enclosing achene, 2–4 mm, 4-angled, ± winged, hard, faces wrinkled.
2n=14. Open, especially disturbed areas; 225–1890 m. Klamath Ranges, High Cascade Range, n&c High Sierra Nevada, n Central Coast, Peninsular Ranges, Modoc Plateau; to British Columbia, Montana. [Sanguisorba occidentalis Torr. & A. Gray, inval.] Apr–Jul [Online Interchange]
Unabridged synonyms: [Sanguisorba occidentalis Nutt. ex Torr. & A. Gray, inval.]
Previous taxon: Poteridium
Next taxon: Poterium
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 4 2015
Citation for this treatment: [Author of taxon treatment] 2013. Poteridium, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=39819, accessed on Oct 4 2015
Copyright © 2014 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
|Geographic subdivisions indicated for the distribution of Poteridium annuum|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS
(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).
View elevation by latitude chart
| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records
CCH collections by month