Adenophyllum

Persoon

Syn. Pl. 2: 458. 1807.

Etymology: Greek adeno, gland, and phyllon, leaf
Treatment appears in FNA Volume 21. Treatment on page 237. Mentioned on page 222.

Annuals, perennials, or subshrubs [shrubs], (20–) 30–70 [–250+] cm. Stems erect, branched from bases or throughout. Leaves cauline; mostly opposite (distal sometimes alternate); petiolate or sessile; blades (or lobes) ovate, oblanceolate, or linear, 1-pinnately lobed, ultimate margins ± toothed (teeth often bristle-tipped), faces glabrous or ± hirtellous to scabrellous (oil-glands usually borne at bases of lobes and subterminally near apices). Heads usually radiate, rarely discoid, borne singly. Calyculi of 3–5 or 12–22 linear to subulate bractlets (sometimes with 1–2 lobes, often bristle-tipped, usually bearing oil-glands). Involucres campanulate to obconic [hemispheric], [5–] 7–20+ mm diam. Phyllaries persistent, 8–20+ in ± 2 series (weakly connate 1/3–3/4 their lengths, separating in age, mostly lanceolate to linear, margins of outer distinct to bases or nearly so, oil-glands in faces and near margins). Receptacles convex, ± pitted (socket margins fimbrillate to setose), epaleate. Ray-florets usually 7–16 [–16], rarely 0, pistillate, fertile; corollas yellow to orange or red-orange. Disc-florets 25–70 [100+], bisexual, fertile; corollas yellow to yellow-orange, tubes shorter than cylindric throats, lobes 5, lanceovate to lance-linear. Cypselae obpyramidal [obconic], glabrous or ± strigose or sericeous; pappi persistent, of 8–20 scales in 1–2 series (single scales muticous, or unequally 3-aristate, or comprising 5–11 basally connate bristles). x = 7, 13.

Distribution

sw United States, Mexico, Central America

Discussion

Species 10 (3 in the flora).

Selected References

None.

Key

1 Annuals; calyculus bractlets eglandular; pappi: outer scales erose, inner each unequally 3-aristate Adenophyllum wrightii
1 Perennials or subshrubs; calyculus bractlets bearing oil-glands; pappi: each scale comprising 5–11 basally connate bristles > 2
2 Leaves 3–5-lobed (lobes linear to cuneate or oblanceolate, ultimate margins entire or toothed); disc florets 25–40; pappi of 8–12 scales Adenophyllum porophylloides
2 Leaves not lobed (blades ovate to oblanceolate, margins toothed); disc florets 50–80; pappi of 15–20 scales Adenophyllum cooperi
... more about "Adenophyllum"
not tailed +, rounded +  and obtuse +
darkened +  and pale +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
John L. Strother +
Persoon +
decurrent +
compound +  and simple +
lobed;linear;oblanceolate;linear;oblanceolate;ovate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
linear;subulate +
barbellulate +  and barbellate +
yellow +  and yellow-orange +
sericeous +, strigose +  and glabrous +
obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
sw United States +, Mexico +  and Central America +
Greek adeno, gland, and phyllon, leaf +
hirtellous +  and glabrous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
cymiform +, corymbiform +, discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.7 cm7 mm <br />0.007 m <br /> (2 cm20 mm <br />0.02 m <br />) +
campanulate;obconic +
sessile +  and petiolate +
lanceovate +  and lance-linear +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
coroniform +
8 +  and 20 +
bearing subulate enations +, hairy +  and bristly +
8 +  and 20 +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Tageteae +
Adenophyllum +
Asteraceae (tribe Heliantheae) subtribe Pectidinae +
cylindric +
70 cm700 mm <br />0.7 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
perennial +  and annual +
30 cm300 mm <br />0.3 m <br /> (70 cm700 mm <br />0.7 m <br />) +