Isocarpha

R. Brown

Trans. Linn. Soc. London 12: 110. 1817.

Common names: Pearlhead
Etymology: Greek iso -, same, and carphos, small dry body, evidently alluding to uniform receptacular paleae
Treatment appears in FNA Volume 21. Treatment on page 490. Mentioned on page 460.
 TaxonIllustrator 
FNA21 P73 Shinnersia rivularis.jpegShinnersia rivularis
Sclerolepis uniflora
Isocarpha oppositifolia var. achyranthes
Linny Heagy
Linny Heagy
Linny Heagy

Perennials or subshrubs [annuals], 10–150 cm. Stems usually erect, sometimes basally decumbent [creeping]. Leaves cauline; mostly opposite (distal sometimes alternate) [alternate]; petiolate or sessile; blades ± 3-nerved, elliptic to narrowly lance-elliptic [ovate or lanceolate to linear], margins entire or serrulate [dentate], faces glabrate to weakly hirsutulous or pilosulous, glanddotted. Heads discoid, borne singly or in tight, corymbiform to subcapitate [paniculiform] arrays. Involucres ± obconic, 4–6 mm diam. Phyllaries persistent, 10–15+ in 2+ series, [1–] 2–3 [–6] -nerved, ovate or elliptic to lanceolate or linear, ± equal. Receptacles conic to columnar, paleate (paleae similar to inner phyllaries). Florets 60–200+; corollas white or pinkish, throats funnelform (lengths ca. 2 times diams.) [cylindric or campanulate], lobes 5, ± deltate; styles: bases enlarged, glabrous [papillose], branches filiform. Cypselae prismatic, 5-ribbed, glabrous [pubescent]; pappi 0. x = 10.

Distribution

s, c United States, Mexico, West Indies, Central America, South America

Discussion

Species 5 (1 in the flora).

"fine" is not a number.

... more about "Isocarpha"
not tailed +, truncate +, rounded +  and obtuse +
scarious +
usually ovate +  and lanceolate +
usually terete +  and clavate +
corymbiform +  and subcapitate +
indeterminate +  and determinate +
Guy L. Nesom +
R. Brown +
decurrent +
enlarged +
lance-elliptic +  and elliptic to narrowly +
dissected +, lobed +, toothed +  and entire +
papillate +  and rugose +
(4-)5-angled;10-ribbed +
filiform +
Pearlhead +
pinkish +  and white +
prismatic +
fertile +  and bisexual +
s +, c United States +, Mexico +, West Indies +, Central America +  and South America +
Greek iso -, same, and carphos, small dry body, evidently alluding to uniform receptacular paleae +
elliptic to narrowly +
glabrate +  and weakly hirsutulous or pilosulous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
in tight , corymbiform to subcapitate arrays +  and singly +
indeterminate +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
sessile +  and petiolate +
deltate +
serrulate +  and entire +
2-carpellate +
persistent +
[1-]2-3[-6]-nerved +
10 +  and 15 +
subequal +  and unequal +
Trans. Linn. Soc. London +
bearing subulate enations +, hairy +  and bristly +
conic;columnar +
keil1981a +
exalbuminous +
appendaged +  and truncate +
hirsutulous +
papillate +
Compositae +
Isocarpha +
Asteraceae tribe Eupatorieae +
10 cm100 mm <br />0.1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +