Crocanthemum arenicola

(Chapman) Barnhart in J. K. Small

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

Common names: Gulf Coast frostweed
Endemic
Basionym: Helianthemum arenicola Chapman Fl. South. U.S., 35. 1860
Treatment appears in FNA Volume 6. Treatment on page 402. Mentioned on page 400, 406.

Herbs. Stems ascending or spreading to erect, 5–15 (–20) cm, stellate-pubescent. Leaves cauline; petiole 0.5–2 mm; blade oblanceolate to lanceolate, 8–20 (–28) × 2–4 (–10) mm, surfaces stellate-tomentose abaxially, stellate-pubescent adaxially, lateral-veins obscure abaxially. Inflorescences usually terminal, sometimes lateral, umbellate; chasmogamous flowers 2–10 per umbel; cleistogamous 2–10 per umbel. Pedicels (2.5–) 5–10 (–15) mm; bracts 1–3.5 × 0.3–0.6 mm. Chasmogamous flowers: outer sepals linear, 2–4 × 0.5 mm, inner sepals 4–8 × 3.5–4.8 mm, apex acute; petals obovate, 8–9.5 × 7.5–9 mm; capsules 3-valved, 3.6–5.4 × 2.4–3.6 mm, stellate-pubescent distally. Cleistogamous flowers: outer sepals linear, 1–2 × 0.4 mm, inner sepals ovate, 3.6–5.6 × 2.2–2.8 mm, apex acute; capsules 3–4.6 × 2.4–3.4 mm, stellate-pubescent distally.


Phenology: Flowering Mar–Apr.
Habitat: Maritime sand dunes and interdunes among pine-oak scrub
Elevation: 0–10 m

Discussion

Crocanthemum arenicola occurs in 11 contiguous counties, from Franklin in Florida to Harrison in Mississippi. Only C. arenicola and C. nashii possess stellate-pubescent ovaries and capsules; they are allopatric, occupy different habitats, and present no identification difficulties.

Selected References

None.

Lower Taxa

None.
... more about "Crocanthemum arenicola"
Bruce A. Sorrie +
(Chapman) Barnhart in J. K. Small +
Helianthemum arenicola +
2 cm20 mm <br />0.02 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
oblanceolate +  and lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.46 cm4.6 mm <br />0.0046 m <br />) +
stellate-pubescent +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
Gulf Coast frostweed +
Ala. +, Fla. +  and Miss. +
0–10 m +
connate +  and distinct +
cleistogamous +  and chasmogamous +
loculicidal +
Maritime sand dunes and interdunes among pine-oak scrub +
racemose +, paniculate +  and corymbose +
0.36 cm3.6 mm <br />0.0036 m <br /> (0.56 cm5.6 mm <br />0.0056 m <br />) +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
stipulate +  and estipulate +
whorled +, opposite +  and alternate +
undulate +  and revolute +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (?) +  and 0.5 cm5 mm <br />0.005 m <br /> (?) +
6-12-carpellate +, 5-carpellate +, 3-carpellate +  and 2-carpellate +
crassinucellate +  and bitegmic +
orthotropous +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
crumpled +  and imbricate +
yellow +, white +, red +, purple +, pink +, dark red +  and green +
distinct +
8mm;9.5mm +
obovate +
0.75 cm7.5 mm <br />0.0075 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering Mar–Apr. +
in J. K. Small, Man. S.E. Fl., +
persistent +
15 cm150 mm <br />0.15 m <br /> (20 cm200 mm <br />0.2 m <br />) +
not dimorphic +
spreading +  and erect +
stellate-pubescent +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
3 +  and 1 +
sessile +  and petiolate +
stellate-pubescent +  and stellate-tomentose +
Helianthemum subg. Lecheoides +
Crocanthemum arenicola +
Crocanthemum +
species +