Baileya

Harvey & A. Gray ex Torrey in W. H. Emory

in W. H. Emory, Not. Milit. Recon., 143. 1848.

Etymology: For Jacob Whitman Bailey, 1811–1857, researcher of diatomaceous algae at the U.S. Military Academy
Treatment appears in FNA Volume 21. Treatment on page 444. Mentioned on page 3, 415, 416, 445.
 TaxonIllustrator 
FNA21 P68 Plateilema palmeri.jpegPlateilema palmeri
Baileya multiradiata
Tetraneuris scaposa var. scaposa
Linda Ann Vorobik
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey

Annuals, biennials, or perennials, 15–100 cm. Stems erect, branched from bases or ± throughout, floccose-woolly. Leaves basal and cauline; alternate; petiolate (basal) or sessile (cauline); blades lance-linear to broadly ovate, sometimes pinnately lobed or pinnatifid, ultimate margins entire, faces usually floccose-woolly. Heads radiate, borne singly or in cymiform arrays. Involucres campanulate to hemispheric, 5–25 mm diam. Phyllaries persistent, 8–13 or 21–34 in 2 series (spreading to erect in fruit, distinct, mostly lance-linear, subequal, floccose-tomentose). Receptacles flat to convex, shallowly pitted, epaleate. Ray-florets 5–7 or 20–55, pistillate, fertile; corollas (usually marcescent) yellow. Disc-florets 10–20 or 40–100+, bisexual, fertile; corollas yellow (hairy), tubes shorter than throats, lobes 5, ± deltate (anther appendages ovate; style-branch apices truncate to acute). Cypselae narrowly obpyramidal, weakly ribbed or striate, glandular-pubescent; pappi usually 0 (rarely of scales). x = 16.

Distribution

sw United States, n Mexico

Discussion

Species 3 (3 in the flora).

Baileya is perhaps best known by B. multiradiata, which is the most widely distributed, most abundant, and (usually) earliest blooming of the three species in the genus. The large-headed vernal form is particularly attractive; this, together with its long flowering season and its drought tolerance, have given the plant recognition in horticultural circles.

Key

1 Heads in loose, cymiform arrays; rays mostly 5–7 Baileya pauciradiata
1 Heads borne singly; rays 20–55 > 2
2 Peduncles (at least in vernal forms) 10–30 cm; style-branch apices truncate to slightly rounded Baileya multiradiata
2 Peduncles 3–12 cm; style-branch apices ± acute Baileya pleniradiata
... more about "Baileya"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
M. W. Turner +
Harvey & A. Gray ex Torrey in W. H. Emory +
decurrent +
compound +  and simple +
pinnatifid;lobed;lance-linear;broadly ovate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
glandular-pubescent +
obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
sw United States +  and n Mexico +
For Jacob Whitman Bailey, 1811–1857, researcher of diatomaceous algae at the U.S. Military Academy +
floccose-woolly +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and radiate +
in cymiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
campanulate;hemispheric +
sessile +  and petiolate +
cauline +  and basal +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
connate +  and distinct +
ovate +, oblong +, oblanceolate +, linear +, lanceolate +  and elliptic +
unequal +  and subequal +
2-carpellate +
persistent +
21 +  and 34 +
in W. H. Emory, Not. Milit. Recon., +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
brown1974a +  and turner1993c +
of 35 +  and 150 bristles +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Baileya +
Asteraceae (tribe Heliantheae) subtribe Gaillardiinae +
urceolate +  and campanulate +
dilated +
toothed +  and entire +
perennial +, biennial +  and annual +
15 cm150 mm <br />0.15 m <br /> (100 cm1,000 mm <br />1 m <br />) +
shrub +  and subshrub +