Helianthus praecox subsp. praecox
Common names: Texas sunflower
EndemicConservation concern
Synonyms: Helianthus debilis subsp. praecox
Stems procumbent to erect, branches horizontal, moderately hispid or hirsute. Leaves (at least larger) 3–8 cm. Peduncles 15–30 cm. Phyllary apices short-acuminate. Paleae: middle teeth puberulent. Rays 14–15.2n = 34.
Phenology: Flowering early summer–fall.
Habitat: Sandy soils
Elevation: 0–50 m
Discussion
Of conservation concern.
Selected References
None.
Lower Taxa
None.
... more about "Helianthus praecox subsp. praecox"
dark +
introrse +
connate +
herbaceous +
short-attenuate;short-acuminate +
scarious +
absent +
purplish red +
hirsute +
papillate +
continuous +
truncate +
3-nerved +
deltate;ovate +
winged;ribbed;winged;ribbed +
1;15 +
horizontal +
stigmatic +
absent +
Texas sunflower +
zygomorphic +
monomorphic +
dimorphic +
villous +
2.5mm;3.3mm +
staminate +
Tex. +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
discoid +
indeterminate +
1;3 +
surrounding +
hemispheric +
opposite +
cauline +
reddish +
triangular +
lobed +
puberulent +
2-carpellate +
inferior +
attached +
anatropous +
3-toothed +
persistent +
falling +
absent +
coroniform +
tough +
thick +
absent +
connate +
short-acuminate +
persistent +
distinct +
falling +
unequal +
Boston J. Nat. Hist. +
1847 +
neuter +
absent +
sterile +
14;15 +
paleate +
flat;slightly convex +
fibrous +
shorter +
aristate +
exalbuminous +
modifed +
2;3 +
alternate +
branched +
procumbent +
erect +
continuous +
2-branched +
papillate +
Helianthus praecox subsp. praecox +
Helianthus praecox +
subspecies +
campanulate +
equaling +
shorter +
annual +