Aphanostephus skirrhobasis var. thalassius

Shinners

Wrightia 1: 106. 1946.

Treatment appears in FNA Volume 20. Treatment on page 352.

Plants 5–40 cm. Stems erect to decumbent, densely puberulent-hispidulous, hairs spreading to deflexed, 0.1–0.5 mm. Leaves thickened, densely, almost felty gray-hairy. Ray-florets (10–) 22–44. Pappi coroniform, uneven, often of awn-tipped or ciliate scales, 0.1–0.3 mm. 2n = 6.


Phenology: Flowering (Feb–)Apr–Dec.
Habitat: Sand dunes near beaches, coastal sands, Rio Grande plains
Elevation: 0–30 m

Distribution

V20-811-distribution-map.gif

Fla., La., Tex., Mexico (Tamaulipas)

Discussion

Variety thalassius is found on the Gulf coast; it differs from var. skirrhobasis primarily in vestiture.

Selected References

None.

Lower Taxa

None.

not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Guy L. Nesom +
Shinners +
bulbous-swollen +
indurate +
Keerlia skirrhobasis +
broadly oblanceolate;linear-lanceolate +
rugulose +  and muricate +
barbellulate +  and barbellate +
not 2-lipped +  and actinomorphic +
yellow +  and white +
subterete +, 4-angled +  and angular-columnar +
fertile +  and bisexual +
fertile +  and bisexual +
Fla. +, La. +, Tex. +  and Mexico (Tamaulipas) +
0–30 m +
glabrous +, strigose +, hirsute +  and hispid +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sand dunes near beaches, coastal sands, Rio Grande plains +
spreading +  and deflexed +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
depressed-hemispheric +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
gray-hairy +  and felty +
deltate +
dentate to pinnatifid +  and entire +
pinnatifid +  and entire +
2-carpellate +
persistent +
coroniform +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Flowering (Feb–)Apr–Dec. +
ovatelanceolate +
unequal +  and subequal +
acute +  and short-acuminate +
bearing subulate enations +, hairy +  and bristly +
ciliate +  and awn-tipped +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
exalbuminous +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
erect +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Keerlia de +
Aphanostephus skirrhobasis var. thalassius +
Aphanostephus skirrhobasis +
variety +
tubular +
puberulent +  and hirsuto-pilose +
5 cm50 mm <br />0.05 m <br /> (45 cm450 mm <br />0.45 m <br />) +