Eremogone aculeata

(S. Watson) Ikonnikov

Novosti Sist. Vyssh. Rast. 10: 139. 1973.

Common names: Prickly sandwort
Endemic
Basionym: Arenaria aculeata S. Watson Botany (Fortieth Parallel), 40. 1871
Synonyms: Arenaria fendleri var. aculeata (S. Watson) S. L. Welsh Arenaria pumicola var. californica Maguire
Treatment appears in FNA Volume 5. Treatment on page 59. Mentioned on page 58, 60.

Plants strongly mat-forming, glaucous, often with woody base. Stems erect, 7–25 (–30) cm, densely stipitate-glandular distally. Leaves: basal leaves persistent; cauline leaves in 1–3 pairs, abruptly reduced distal to lowest pair; basal blades ascending or often arcuate-spreading, needlelike, (0.5–) 1–2.5 (–3.5) cm × 0.5–1.5 mm, rigid, herbaceous, apex spinose, glabrous to puberulent, glaucous. Inflorescences 5–25+-flowered, open cymes. Pedicels 3–25 mm, stipitate-glandular. Flowers: sepals 1–3-veined, lateral-veins less developed or all obscure, ovate, 3–4.5 mm, to 6 mm in fruit, margins broad, apex usually obtuse to rounded, abruptly acute, sparsely to densely stipitate-glandular; petals white, obovate to oblanceolate, 4.5–10 mm, 1.5–3 times as long as sepals, apex rounded; nectaries as lateral and abaxial rounding, with slight lateral expansion, at base of filaments opposite sepals, 0.3 mm. Capsules 5–9 mm, glabrous. Seeds yellowish tan to gray, ellipsoid-oblong, 1.8–2.5 (–3.2) mm, tuberculate; tubercles rounded, elongate. 2n = 22.


Phenology: Flowering summer–early fall.
Habitat: Rocky slopes, alluvium, volcanic areas
Elevation: 1500-3400 m

Distribution

V5 116-distribution-map.gif

Calif., Idaho, Mont., Nev., Oreg., Utah, Wash.

Discussion

Some specimens from north-central California and southwestern Oregon have been named Arenaria pumicola var. californica. R. L. Hartman (1993) considered those plants to be robust forms of Eremogone aculeata, not deserving formal recognition. Based on work by M. F. Baad (1969), they warrant further study.

Reports of Eremogone aculeata from Arizona, New Mexico, and Wyoming are erroneous.

Selected References

None.

Lower Taxa

None.
... more about "Eremogone aculeata"
stipitate-glandular +, glaucous +, glabrous +  and puberulent +
rounded;acute;usually obtuse;rounded +
Ronald L. Hartman +, Richard K. Rabeler +  and Frederick H. Utech +
(S. Watson) Ikonnikov +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Arenaria aculeata +
filiform +  and subulate or narrowly linear +
not +  and succulent +
reduced +
ovoid;urceolate +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
distal +  and lowest +
Prickly sandwort +
dish--shaped +
expanded +
Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +  and Wash. +
1500-3400 m +
straight +  and curved +
central +  and peripheral +
inconspicuous +
unisexual +  and bisexual +
stalked +  and simple +
Rocky slopes, alluvium, volcanic areas +
disc--shaped +  and dish +
all +  and developed +
0 cm0 mm <br />0 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
connate +
0.3 cm3 mm <br />0.003 m <br /> (?) +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
stipitate-glandular +
0.3 cm3 mm <br />0.003 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
fugacious +
1.5-3 times as long as sepals +
obovate +  and oblanceolate +
0.45 cm4.5 mm <br />0.0045 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering summer–early fall. +
Novosti Sist. Vyssh. Rast. +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
yellowish tan;gray +
tuberculate +
ellipsoid-oblong +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
persistent +
connate +  and distinct +
linear-lanceolate;ovate +
0.18 cm1.8 mm <br />0.0018 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
branched +  and simple +
25 cm250 mm <br />0.25 m <br /> (30 cm300 mm <br />0.3 m <br />) +
stipitate-glandular +
7 cm70 mm <br />0.07 m <br /> (25 cm250 mm <br />0.25 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 fendleri var. aculeata +  and Arenaria pumicola var. californica +
stout +  and slender +
Eremogone aculeata +
Eremogone +
species +
ascending;recurved +
divided +
elongate +  and rounded +
10 +  and 8 +
rhizomatous +  and taprooted +
plant +  and mat-forming +