Tracyina

S. F. Blake

Madroño 4: 74, fig. 1. 1937.

Etymology: For Joseph Prince Tracy, 1879–1953, Californian botanist
Treatment appears in FNA Volume 20. Treatment on page 50. Mentioned on page 10, 46.
 TaxonIllustrator 
FNA20 P05 Rigiopapus leptocladus.jpegRigiopappus leptocladus
Tracyina rostrata
Ericameria cuneata var. cuneata
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey
John Myers

Annuals, 5–30+ cm (taprooted). Stems erect, simple or branched distally, glabrous or sparsely hirsutulous. Leaves mostly cauline (at flowering); alternate; ± sessile; blades (1-nerved or 3-nerved), lance-linear to linear, margins entire (ciliate), faces glabrous or sparsely hirsutulous. Heads radiate, borne singly (tips of branches). Involucres ± cylindric to turbinate or obconic, 1–3+ mm diam. Phyllaries (persistent) (6–) 20–30+ in (2–) 3–4+ series, appressed, 1-nerved (flat),linear to subulate, unequal (outer shorter), herbaceous, abaxial faces glabrous or sparsely hirsutulous. Receptacles convex, pitted or smooth, epaleate. Ray-florets (3–) 12–15 (–20+), pistillate, fertile; corollas yellowish, often tinged with purple (laminae inconspicuous). Disc-florets (4–) 15–25+, bisexual, fertile; corollas pale-yellow to purplish, tubes shorter than narrowly cylindric throats, lobes 5, erect, lance-deltate; style-branch appendages attenuate. Cypselae ± fusiform (distally attenuate, almost beaked), 5-nerved, glabrous or glabrate (ray) or ± hirsutulous (disc); pappi persistent (fragile), of (12–) 30–40 whitish, barbellulate, apically attenuate bristles in 1 (–2) series (subequal or outer shorter). x = 9.

Discussion

Species 1.

Selected References

None.

Lower Taxa

... more about "Tracyina"
hirsutulous +  and glabrous +
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
John L. Strother +
S. F. Blake +
decurrent +
compound +  and simple +
rugulose +  and muricate +
not 2-lipped +  and actinomorphic +
pale-yellow +  and purplish +
beaked +, 2-ribbed +  and 5-ribbed +
hirsutulous +, glabrate +  and glabrous +
fertile +  and bisexual +
fertile +  and bisexual +
For Joseph Prince Tracy, 1879–1953, Californian botanist +
hirsutulous +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
less cylindric;turbinate or obconic +
lance-deltate +
2-carpellate +
persistent +
linear +  and subulate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
branched +  and simple +
hirsutulous +  and glabrous +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Tracyina +
Asteraceae tribe Astereae +
cylindric +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
tree +, shrub +  and subshrub +