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.
Revision as of 21:10, 29 July 2020 by imported>Volume Importer
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 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 +