Eremogone congesta var. cephaloidea

(Rydberg) R. L. Hartman & Rabeler

Sida 21: 239. 2004.

Common names: Sharptip sandwort
Endemic
Basionym: Arenaria cephaloidea Rydberg Bull. Torrey Bot. Club 39: 316. 1912
Synonyms: Arenaria congesta var. cephaloidea (Rydberg) Maguire
Treatment appears in FNA Volume 5. Treatment on page 61. Mentioned on page 62.

Stems 20–40 (–50) cm, glabrous. Leaves: basal blades erect to somewhat spreading, filiform, 3–8 (–14) cm × 0.4–0.7 mm, herbaceous. Inflorescences capitate, often pyramidal, dense cymes; bracts closely enveloping sepals. Pedicels ± absent, mostly shorter than 0.1 mm, glabrous. Sepals weakly to conspicuously 1–3-veined, 4–5 mm, apex acute to acuminate.


Phenology: Flowering summer.
Habitat: Open, gravelly woods
Elevation: 300-1000 m

Discussion

The pyramidal inflorescence of var. cephaloidea bears a fanciful resemblance to the grass Dactylis glomerata Linnaeus and some members of Carex Linnaeus sect. Ovales Kunth.

Selected References

None.

Lower Taxa

None.
entire +  and slightly emarginate +
glabrous +  and glaucous +
acute;acuminate +
Ronald L. Hartman +, Richard K. Rabeler +  and Frederick H. Utech +
(Rydberg) R. L. Hartman & Rabeler +
8 cm80 mm <br />0.08 m <br /> (14 cm140 mm <br />0.14 m <br />) +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
herbaceous +  and more or less fleshy +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
not +  and persistent +
Arenaria cephaloidea +
filiform +  and subulate or narrowly linear +
not +  and succulent +
reduced +
ovoid;urceolate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Sharptip sandwort +
dish--shaped +
expanded +
Idaho +, Oreg. +  and Wash. +
300-1000 m +
straight +  and curved +
central +  and peripheral +
inconspicuous +
unisexual +  and bisexual +
stalked +  and simple +
crescent--shaped +
Open, gravelly woods +
disc--shaped +  and dish +
open +  and 3-50+-flowered +
connate +
0.15mm;0.2mm +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (?) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
fugacious +
1.5-2 times as long as sepals +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Flowering summer. +
reddish-brown;black +
tuberculate +
broadly ellipsoid +  and ovoid +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
persistent +
connate +  and distinct +
ovate;lanceolate +
not expanding +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
branched +  and simple +
40 cm400 mm <br />0.4 m <br /> (50 cm500 mm <br />0.5 m <br />) +
20 cm200 mm <br />0.2 m <br /> (40 cm400 mm <br />0.4 m <br />) +
[50 +  and 3 +
smooth +  and papillate +
distinct +
filiform +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Arenaria congesta var. cephaloidea +
stout +  and slender +
Eremogone congesta var. cephaloidea +
Eremogone congesta +
variety +
ascending;recurved +
divided +
elongate +  and rounded +
10 +  and 8 +
rhizomatous +  and taprooted +
plant +  and matted +