|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 perennial herb [to trees]. Stem: decumbent to erect, < 2 m, simple or branched. Leaf: simple, cauline, sometimes also basal, opposite or whorled, entire, sessile or basal ± petioled; stipules 0. Flower: bisexual, radial, parts in 4s or 5s except pistil 1; sepals fused, persistent; petals fused, ± persistent, sinus between lobes often unappendaged; stamens epipetalous, alternate corolla lobes; ovary superior, chamber 1, placentas parietal, often intruding, stigmas 1–2. Fruit: capsule, 2-valved. Seed: many.
± 90 genera, 1800 species: worldwide; some cultivated (Eustoma, Exacum, Gentiana). [Struwe & Albert 2002 Gentianaceae. Cambridge Univ Press] Gentianella tenella moved to Comastoma. Key to genera revised by Bruce G. Baldwin. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Wood & Weaver 1982 J Arnold Arbor 63:441–487; Struwe & Albert 2002 Gentianaceae: Systematics and Natural History. Cambridge Univ Press]
Key to Gentianaceae
Annual, glabrous. Leaf: basal, cauline, opposite. Inflorescence: flowers 1, terminal on branches; pedicels >> subtending internode. Flower: parts generally in 4s; calyx tube << lobes; corolla < 2 cm, narrowly funnel-shaped, lobes spreading, < tube, ± entire, with 2 fringed scales on adaxial surface near base, nectary pits 0 (nectaries on lower corolla tube); ovary sessile, style ± 0, stigmas 2, persistent.
± 17 species: temperate to arctic, alpine North America, Eurasia. (Greek: hair, mouth, from fringes on corolla lobes)
Plant < 15(25) cm. Stem: decumbent to erect, 1–25, simple or branched near base. Leaf: generally basal, < 20 mm, elliptic-oblong to spoon-shaped; cauline 1–4 pairs, smaller. Inflorescence: pedicels 2–10 cm. Flower: calyx 4–11 mm, lobes ovate to lanceolate; corolla 6–17 mm, pale violet-blue to white, lobes 2–4.5 mm, ovate-oblong.
2n=10. Open, wet places; 3200–3900 m. c&s High Sierra Nevada, White and Inyo Mountains; to Alaska, Colorado; circumpolar. [Gentianella tenella (Rottb.) Börner subsp. tenella] Jul–Aug [Online Interchange]
Unabridged synonyms: [Gentiana tenella Rottb.; Comastoma tenellum var. tenellum; Gentianella tenella (Rottb.) Börner var. tenella]
Previous taxon: Comastoma
Next taxon: Eustoma
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Dec 20 2014
Citation for this treatment: [Author of taxon treatment] 2013. Comastoma, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=20070, accessed on Dec 20 2014
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 Comastoma tenellum|| 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