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Calycoseris
Family:
Asteraceae
Max Licher
FNA
Resources
L. D. Gottlieb in Flora of North America (vol. 19, 20 and 21)
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.
Species within checklist:
Flora of the Sonoran Desert Network
Calycoseris parryi
Map not
Available
Calycoseris wrightii
Map not
Available
This project was made possible in part by the Institute of Museum and Library Services [MG-70-19-0057-19].
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