Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Dodecahema

spineflower, spinyherb
Habit Herbs, annual; taproot slender.
Stems

arising directly from the root, spreading, solid, not fistulose or disarticulating into ringlike segments, sparsely glandular.
Leaves

usually quickly deciduous, basal, rosulate;

petiole present;

blade narrowly oblanceolate, margins entire.
Inflorescences

terminal, cymose, uniparous due to suppression of secondaries;

branches dichotomous, not brittle or disarticulating into segments, round, sparsely glandular;

bracts 3–4, positioned to side and opposite next distal subsequent branch or involucre, connate ca. 1/2 their length, lanceolate, awned, sparsely glandular.
Peduncles

spreading, peglike.
Involucres

1 per node, tubular, cylindric, 6-angled;

teeth 6, awn-tipped, awns uncinate.
Flowers

3 per involucre;

perianth white to pink, campanulate when open, cylindric when closed, pubescent abaxially;

tepals 6, connate proximally, monomorphic, entire apically;

stamens 9;

filaments free, glabrous;

anthers red to maroon, oblong.
Achenes

included, dark brown to black, not winged, 3-gonous, glabrous.
Seeds

embryo curved.
x

= ca. 17.

Dodecahema
Distribution
from FNA
CA
[BONAP county map]
Discussion

Species 1.

Each of the 12 awns on each involucre of Dodecahema leptoceras is long and slender. They are more like those seen in Sidotheca (Eriogonineae) than those of any member of the Chorizanthineae. J. L. Reveal and C. B. Hardham (1989) reported a consistent chromosome count of n = 15 plus (seemingly) additional chromosome fragments that bring the number to approximately n = 17. More work is required to resolve the exact chromosome number for the species. A specimen (Meiere s.n., 4 May 1917, CAS) supposedly from Needles, San Bernardino County, is discounted.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 5, p. 474. Author: James L. Reveal.
Parent taxa Polygonaceae > subfam. Eriogonoideae
Subordinate taxa
D. leptoceras
Synonyms Centrostegia section Diplostegia
Name authority Reveal & Hardham: Phytologia 66: 86. (1989)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America

The species comparison tool is brought to you by:
Northwest Wildflowers