Simsia lagasceiformis
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 577. 1836.
Common names: Annual bush sunflower
Synonyms: Simsia exaristata A. Gray
Annuals (rarely persisting), 20–400 cm (taprooted or fibrous-rooted). Leaves: petiole bases rarely dilated (not fused to form nodal discs), blades ovate to deltate, 2–21 × 1–16 cm, rarely 3-lobed. Heads in tight to loose, corymbiform arrays. Peduncles 0.5–10 cm. Involucres 8–12 × 5–10 mm. Phyllaries 13–19, unequal. Ray-florets 5–10; corollas orange-yellow, laminae 5.1–12 mm. Disc-florets 13–27; anthers yellow proximally, usually purple to bronze distally. Cypselae 4.2–6 mm; pappi usually 2.5–4.6 mm, rarely 0.2n = 34.
Phenology: Flowering year round (mostly Sep–Dec).
Habitat: Deserts, roadsides, open fields, borders of agricultural fields
Elevation: 100–2200 m
Distribution
Ariz., N.Mex., Tex., Mexico, Central America (Guatemala)
Discussion
Selected References
None.
Lower Taxa
None.
... more about "Simsia lagasceiformis"
introrse +
connate +
herbaceous +
scarious +
absent +
hirsute +
papillate +
corymbiform +
continuous +
3-nerved +
3;45 +
3-lobed;ovate;deltate +
winged;ribbed;winged;ribbed +
1;15 +
stigmatic +
absent +
Annual bush sunflower +
zygomorphic +
orange-yellow +
thin-margined +
dimorphic +
flattened +
4.2mm;6mm +
staminate +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
discoid +
indeterminate +
surrounding +
campanulate +
petiolate +
cauline +
triangular +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
fragile +
falling +
absent +
coroniform +
tough +
thick +
absent +
connate +
dilated +
persistent +
distinct +
falling +
unequal +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
1836 +
styliferous +
absent +
sterile +
paleate +
low-convex +
fibrous +
subulate +
exalbuminous +
modifed +
2;4 +
alternate +
branched +
continuous +
2-branched +
papillate +
Simsia lagasceiformis +
Simsia +
species +
cylindric +
equaling +
shorter +
annual +
subshrub +