Crocanthemum georgianum

(Chapman) Barnhart in J. K. Small

in J. K. Small, Man. S.E. Fl., 879. 1933.

Common names: Georgia frostweed
Endemic
Basionym: Helianthemum georgianum Chapman Fl. South. U.S. ed. 3, 36. 1897
Treatment appears in FNA Volume 6. Treatment on page 405. Mentioned on page 400, 401.
Revision as of 10:40, 30 July 2020 by imported>Volume Importer
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Herbs or subshrubs. Stems from caudices and elongate horizontal rootstocks, erect or spreading, (10–) 15–30 (–40) cm, stellate-tomentose. Leaves usually basal mat-forming or sometimes absent and cauline; petiole 1–2 mm; blade spatulate to oblanceolate, 10–28 × 5–11 mm, surfaces stellate-pannose, without simple hairs; cauline: petiole 1–3 mm; blade oblanceolate to narrowly elliptic, 20–40 × (2–) 4.5–9 (–12) mm, surfaces stellate-tomentose abaxially, stellate-pubescent adaxially, without simple hairs; lateral-veins raised abaxially. Inflorescences terminal, racemose cymes; flowers (chasmogamous or cleistogamous) 2–7 per cyme, produced simultaneously. Pedicels 5–12 mm; bracts 1.2–5 × 0.3–1 mm. Chasmogamous flowers: outer sepals linear, 1.5–3.5 × 0.3–0.5 mm, inner sepals 3.6–6.6 × 3–4.5 mm, apex acute; petals obovate, 6–10 (–12) × 4–8 (–11) mm; capsules 3.8–5.7 × 3.2–4.5 mm, glabrous. Cleistogamous flowers: outer sepals linear, 1.4–2.2 × 0.3 mm, inner sepals ovate, 3–4.2 × 2.6–3.8 mm, apex acute; capsules 3–4.2 × 2.4–3.3 mm, glabrous.


Phenology: Flowering Apr–Jun.
Habitat: Dry, sandy oak-pine woods, turkey oak sandhills, stable maritime dunes, maritime woodlands
Elevation: 0–600 m

Distribution

V6 765-distribution-map.jpg

Ala., Ark., Fla., Ga., La., Miss., N.C., Okla., S.C., Tex.

Discussion

Basal leaves occur often enough in Crocanthemum georgianum to be very useful for identification; in the eastern United States only C. carolinianum also regularly has basal leaves. Plants of maritime situations tend to be shorter than inland plants.

Selected References

None.

Lower Taxa

None.
... more about "Crocanthemum georgianum"
Bruce A. Sorrie +
(Chapman) Barnhart in J. K. Small +
Helianthemum georgianum +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
oblanceolate +  and narrowly elliptic +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
Georgia frostweed +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, Okla. +, S.C. +  and Tex. +
0–600 m +
connate +  and distinct +
cleistogamous +  and chasmogamous +
loculicidal +
Dry, sandy oak-pine woods, turkey oak sandhills, stable maritime dunes, maritime woodlands +
umbellate +, thyrsiform +  and cymose +
racemose +, paniculate +  and corymbose +
0.3 cm3 mm <br />0.003 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
stipulate +  and estipulate +
whorled +, opposite +  and alternate +
mat-forming +
undulate +  and revolute +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (?) +, 0.03 cm0.3 mm <br />3.0e-4 m <br /> (?) +  and 0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +
6-12-carpellate +, 5-carpellate +, 3-carpellate +  and 2-carpellate +
crassinucellate +  and bitegmic +
orthotropous +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
crumpled +  and imbricate +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
yellow +, white +, red +, purple +, pink +, dark red +  and green +
distinct +
6mm;10mm +
obovate +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering Apr–Jun. +
in J. K. Small, Man. S.E. Fl., +
persistent +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
not dimorphic +
spreading +  and erect +
stellate-tomentose +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
3 +  and 1 +
sessile +  and petiolate +
stellate-pubescent +, stellate-tomentose +  and stellate-pannose +
Helianthemum subg. Lecheoides +
Crocanthemum georgianum +
Crocanthemum +
species +
subshrub +  and herb +