Thurovia triflora

Rose

Contr. U.S. Natl. Herb. 3: 321, plate 15. 1895.

Common names: Three-flower snakeweed
IllustratedEndemicConservation concern
Synonyms: Gutierrezia triflora (Rose) M. A. Lane
Treatment appears in FNA Volume 20. Treatment on page 87.

Leaves ascending-appressed, 2–10 (–15) mm, gradually reduced distally. Heads 10–20, borne singly in leaf-axils, sessile or subsessile. Disc corollas 2.3–2.8 mm. Cypselae 0.9–1.7 mm; pappi equaling corollas, erose, apiculate. 2n = 10.


Phenology: Flowering Sep–Nov.
Habitat: Clay soil, less commonly sandy loam, coastal flats and shallow banks, "slick spots" in coastal prairie grasslands, upper margins of ecotone between salty prairies and tidal flats, openings in thickets
Elevation: 0–10 m

Discussion

Of conservation concern.

Thurovia triflora is known only from Calhoun, Harris, Jackson, and Matagorda counties on the Gulf coastal plain of southeastern Texas.

Selected References

None.

Lower Taxa

None.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

... more about "Thurovia triflora"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Guy L. Nesom +
decurrent +
compound +  and simple +
linear-filiform +
rugulose +  and muricate +
barbellulate +  and barbellate +
Three-flower snakeweed +
not 2-lipped +  and actinomorphic +
pale-yellow +  and white +
beaked +, 2-ribbed +  and 5-ribbed +
white-sericeous +
subterete +  and obconic +
fertile +  and bisexual +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
fertile +  and bisexual +
0–10 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Clay soil, less commonly sandy loam, coastal flats and shallow banks, "slick spots" in coastal prairie grasslands, upper margins of ecotone between salty prairies and tidal flats, openings in thickets +
subsessile +  and sessile +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
cylindro-obconic +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
ascending-appressed +
reduced +
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 1 cm10 mm <br />0.01 m <br /> (?) +
spreading-recurved +
lanceolate +
oblong-lanceolate +  and linear-oblong +
2-carpellate +
persistent +
Flowering Sep–Nov. +
Contr. U.S. Natl. Herb. +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
concave;usually flat;conic +
apiculate +  and erose +
silvery white +
ovatelanceolate +
exalbuminous +
Illustrated +, Endemic +  and Conservation concern +
appendaged +  and truncate +
papillate +  and smooth +
Gutierrezia triflora +
Thurovia triflora +
Thurovia +
species +
perennial +  and annual +
6 cm60 mm <br />0.06 m <br /> (45 cm450 mm <br />0.45 m <br />) +
tree +, shrub +  and subshrub +