Chrysoma

Nuttall

J. Acad. Nat. Sci. Philadelphia 7: 67. 1834.

Etymology: Greek chrysos, gold, and - ome, having the condition of alluding to predominantly yellow-gold heads and corymbs
Treatment appears in FNA Volume 20. Treatment on page 105. Mentioned on page 5, 96, 108.
 TaxonIllustrator 
FNA20 p11 Cuniculotinus gramineus.jpegCuniculotinus gramineus
Sericocarpus asteroides
Chrysoma pauciflosculosa
Barbara Alongi
Marjorie C. Leggitt
Barbara Alongi

Shrubs, 50–100 cm (evergreen), glabrous, resinous. Stems erect, branched. Leaves cauline; alternate; sessile; blades 1-nerved, oblanceolate to narrowly elliptic (bases sometimes attenuate), margins entire, faces gland-dotted, resinous (covered by reticulum of subisodiametric areoles, each areole surrounded by sunken border). Heads usually radiate, sometimes discoid, in dense (terminal), cymiform arrays. Involucres cylindric, (5–6 ×) 2–2.5 mm. Phyllaries 8–12 in 3–4 (–5) series (in vertical ranks), erect, loose, stamineous, 1-nerved (midnerves orange-resinous from bases to apices; flat), lanceolate, unequal, margins scarious. Receptacles flat, shallowly pitted, epaleate. Ray-florets (0–) 1–2 (–3), pistillate, fertile; corollas yellow. Disc-florets (2–) 3–4 (–5), bisexual, fertile; corollas yellow, tubular-funnelform, tubes longer than throats, lobes 5, spreading-recurving, lanceolate; style-branch appendages linear-triangular (closely papillate). Cypselae (brownish) turbinate-oblong, nearly terete, 8–10-ribbed, densely strigoso-sericeous; pappi persistent, of 40–60 tan, unequal, barbellate, apically attenuate bristles in 2–3 series. x = 9.

Distribution

se United States

Discussion

Species 1.

Chrysoma pauciflosculosa was originally described within Solidago; it is distinct in anatomy (F. E. Lloyd 1901; K. Phillips 1963; L. C. Anderson and J. B. Creech 1975) and other features. Chrysoma is recognized by its shrubby habit, areolate-resinous leaves, corymbiform arrays of glomerate, cylindric, few-flowered heads, long disc corolla lobes, and papillate style-branch appendages.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

... more about "Chrysoma"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Guy L. Nesom +
Nuttall +
decurrent +
oblanceolate;narrowly elliptic +
rugulose +  and muricate +
not 2-lipped +  and actinomorphic +
strigoso-sericeous +
terete +  and turbinate-oblong +
fertile +  and bisexual +
fertile +  and bisexual +
se United States +
Greek chrysos, gold, and - ome, having the condition of +  and alluding to predominantly yellow-gold heads and corymbs +
resinous +
gland-dotted +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
spreading-recurving +
lanceolate +
2-carpellate +
persistent +
lanceolate +
J. Acad. Nat. Sci. Philadelphia +
bearing subulate enations +, hairy +  and bristly +
concave;usually flat;conic +
lloyd1901a +  and phillips1963a +
exalbuminous +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Chrysoma +
Asteraceae tribe Astereae +
perennial +, biennial +  and annual +