Calycoseris

A. Gray

Smithsonian Contr. Knowl. 5(6): 104, plate 14. 1853.

Common names: Tack-stem
Etymology: Greek kalyx, cup, and seris, chicory, alluding to shallow cups on apices of cypselae
Treatment appears in FNA Volume 19. Treatment on page 307. Mentioned on page 216, 310, 360.

Annuals, 5–30 cm; taprooted. Stems 1–3, erect or ascending, branched from bases; distal stems, branches, and involucres conspicuously dotted with short, stipitate, flat-topped glands that resemble tacks. Leaves basal and cauline; alternate; sessile; basal blades pinnately lobed (lobes narrow, linear, often delicate, spreading, margins entire, smooth); distal reduced to linear, entire bracts. Heads borne singly or in open, cymiform arrays. Peduncles (1–3 cm) not inflated, not bracteate. Calyculi of 8–16, reflexed, unequal bractlets (lengths to 1/2 phyllaries). Involucres campanulate, 5–12+ mm diam. Phyllaries 12–20 in 1 series, linear-lanceolate, equal, margins scarious, apices acute. Receptacles flat, smooth, bristly, epaleate (each floret subtended by 1 fine, capillary bristle). Florets ca. 25; corollas white or yellow (showy). Cypselae tan to brown, fusiform, beaked, ribs 5, separated by longitudinal grooves, faces glabrous or scabridulous; pappi (borne on denticulate cups at beak tips) falling (together), of 50–60+, white, basally connate, smooth bristles 5–8 (–9) mm in 1 series. x = 7.

Distribution

sw United States, nw Mexico

Discussion

Species 2 (2 in the flora).

Selected References

None.

Key

1 Ligules yellow; tack-shaped glands red- or purple-tipped; cypselae deeply grooved between ribs, faces not rugulose Calycoseris parryi
1 Ligules white; tack-shaped glands straw-colored; cypselae shallowly grooved between ribs, faces weakly cross-rugulose Calycoseris wrightii

"fine" is not a number.

... more about "Calycoseris"
scarious +
ovate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
L. D. Gottlieb +
A. Gray +
decurrent +
compound +  and simple +
tuberculate +, rugose +, muricate +  and smooth +
filiform +
0.8 cm8 mm <br />0.008 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Tack-stem +
zygomorphic +, actinomorphic +  and (3-)5-merous +
yellow +  and white +
tan +  and brown +
sw United States +  and nw Mexico +
Greek kalyx, cup, and seris, chicory, alluding to shallow cups on apices of cypselae +
scabridulous +
winged +  and beaked +
dispersed +
flat-topped +
in open , cymiform arrays +  and singly +
indeterminate +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate +
cauline +  and basal +
divided +, lobed +  and dentate +
2-carpellate +
not inflated +
connate +  and distinct +
12 +  and 20 +
subequal +  and unequal +
Smithsonian Contr. Knowl. +
flat;convex +
exalbuminous +
ascending +  and erect +
1 +  and 3 +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Calycoseris +
Asteraceae tribe Cichorieae +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
shrub +  and subshrub +