Flourensia

de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 592. 1836.

Etymology: For Marie-Jean-Pierre Flourens, 1794–1867, physiologist, perpetual secretary, Académie des Sciences, Paris
Treatment appears in FNA Volume 21. Treatment on page 117. Mentioned on page 65, 66, 119.
 TaxonIllustrator 
FNA21 P17 Phoebanthus grandiflo.jpegPhoebanthus grandiflorus
Helianthella quinquenervis
Flourensia cernua
Marjorie C. Leggitt
Yevonn Wilson-Ramsey
Barbara Alongi

Subshrubs or shrubs [trees], to 100 (–200) [–500+] cm. Stems erect, branched from bases or ± throughout. Leaves cauline; alternate; petiolate [nearly sessile]; blades pinnately nerved, mostly elliptic to lance-oblong or ovate, bases rounded to cuneate, margins entire [toothed], faces glabrous or ± scabrellous, usually glanddotted and vernicose. Heads discoid or radiate, borne ± singly or in ± spiciform arrays. Involucres campanulate to hemispheric, 4–20 mm diam. Phyllaries persistent, 12–40 in 2–4+ series (subequal or unequal, outer longer). Receptacles flat to conic-ovoid, paleate (paleae conduplicate, cartilaginous to scarious). Ray-florets 0 or [5–] 13–21, either neuter, or styliferous and sterile; corollas yellow. Disc-florets 10–50 [–150], bisexual, fertile; corollas yellow, tubes much shorter than cylindric-funnelform throats, lobes 5, ± deltate. Cypselae ± compressed or flattened [subterete], oblong to oblanceolate (not winged, ± sericeous); pappi persistent or tardily falling, of 2 subulate scales. x = 9.

Distribution

sw United States, Mexico, Central America, South America

Discussion

Species ca. 30 (2 in the flora).

Key

1 Shrubs; leaf blades elliptic to ovate, 10–25(–40+) × 4–15(–20) mm; ray florets 0 Flourensia cernua
1 Subshrubs; leaf blades elliptic to lance-oblong, (20–)50–100 × 10–40+ mm; ray florets 13–21 Flourensia pringlei

"broader" is not a number.

... more about "Flourensia"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John L. Strother +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
bristlelike +
coroniform +
rounded +  and cuneate +
mostly elliptic;lance-oblong or ovate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
hairy +  and glabrous +
less compressed or flattened oblong +  and oblanceolate +
fertile +  and bisexual +
fertile +  and bisexual +
sw United States +, Mexico +, Central America +  and South America +
For Marie-Jean-Pierre Flourens, 1794–1867, physiologist, perpetual secretary, Académie des Sciences, Paris +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
in more or less spiciform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (2 cm20 mm <br />0.02 m <br />) +
campanulate;hemispheric +
deltate +
2-carpellate +
persistent +
12 +  and 40 +
unequal +  and subequal +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
styliferous +  and neuter +
bearing subulate enations +, hairy +  and bristly +
flat;conic-ovoid +
dillon1984a +
subulate +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Enceliinae +, Undefined (tribe Undefined) subtribe Engelmanniinae +, Undefined (tribe Undefined) subtribe Spilanthinae +, Undefined (tribe Undefined) subtribe Verbesininae +  and Undefined (tribe Undefined) subtribe Zinniinae +
Flourensia +
Asteraceae (tribe Heliantheae) subtribe Ecliptinae +
cylindric +
shorter to longer than campanulate +
toothed +  and entire +
perennial +  and annual +
shrub +  and subshrub +