Okenia hypogaea

Schlechtendal & Chamisso

Linnaea 5: 92. 1830.

Common names: Dune-groundnut
Illustrated
Treatment appears in FNA Volume 4. Treatment on page 39. Mentioned on page 37.

Stems 0.2–2 m. Leaves: small leaf of pair often not equaling petiole of larger leaf; petiole 8–45 mm; blade ovate, ovate-deltate, or elliptic-ovate, 9–50 × 3–45 mm, base slightly to strongly oblique, truncate to cordate, margins sinuate and undulate, apex usually rounded, sometimes obtuse or acute, surfaces often red-punctate. Inflorescences: peduncle 1–9 mm at anthesis, rapidly elongating and curving downward as perianth wilts, ultimately 10–30 cm. Perianth magenta [rarely yellow], 10–30 [–50] × 9–30 [–45] mm. Fruits brownish or whitish, 9–13 × 6–9 mm.


Phenology: Flowering early spring–late fall [year-round].
Habitat: Sandy areas along coast [inland]
Elevation: 0[-1800] m

Distribution

V4 73-distribution-map.gif

Fla., Mexico, Central America (Nicaragua)

Discussion

A. L. Bogle (1974) indicated that the flowers of Okenia hypogaea may be cleistogamous. Information provided on a specimen label suggests that flowers with a conspicuous perianth are staminate and that cleistogamous flowers are rare. The reproductive biology is in need of study. Herbarium specimens very rarely contain fruits. Peduncles may be mistaken for adventitious roots by collectors, the fruit very easily torn from the peduncle as the plant is taken. The descending peduncle resembles a root to the point that a conic cap of cells, resembling a root cap, develops over the tip of the perianth base that is to become part of the fruit (A. L. Bogle 1974).

Selected References

None.

Lower Taxa

None.

"thin" is not a number."elongating" is not a number.

... more about "Okenia hypogaea"
Richard W. Spellenberg +
Schlechtendal & Chamisso +
glutinous +
truncate +  and cordate +
unequal +
woody +, leathery +  and fleshy +
0.9 cm9 mm <br />0.009 m <br /> (5 cm50 mm <br />0.05 m <br />) +
elliptic-ovate;ovate-deltate;elliptic-ovate;ovate-deltate;ovate +
3mm;45mm +
deciduous +
distinct +
lanceolate +
corollalike +  and petaloid +
Dune-groundnut +
Fla. +, Mexico +  and Central America (Nicaragua) +
0[-1800] m +
curved +  and straight +
inconspicuous +  and showy +
1 +  and 80 +
chasmogamous +  and bisexual +
whitish +  and brownish +
9mm;13mm +
geocarpous +
rugose +  and smooth +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Sandy areas along coast [inland] +
lateral +  and terminal +
pubescent +  and glabrous +
undulate +  and sinuate +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
gradually flared +  and 5-lobed +
constricted +
0.9 cm9 mm <br />0.009 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
Flowering early spring–late fall [year-round]. +
thick +  and thin +
fibrous;fleshy +
membranaceous +
ribbed +, 10-ribbed +  and 5-ribbed +
pubescent +, glabrous +  and warty +
wrinkled +
Illustrated +
exserted +  and included +
20 cm200 mm <br />0.2 m <br /> (200 cm2,000 mm <br />2 m <br />) +
fusiform +  and linear +
filiform +
Okenia hypogaea +
species +
gland-tipped +