familyAsteraceae
genusSymphyotrichum
Show Lower Taxa
Symphyotrichum sect. Conyzopsis
Phytologia 77: 271. 1975.
Basionym: Conyzopsis Torrey & A. Gray Fl. N. Amer. 2: 162. 1841
Synonyms: Aster subg. Conyzopsis Undefined sect. Brachyactis Ledebour
Annuals (sometimes perennials in S. frondosum); taprooted. Stems usually branched. Heads radiate or disciform. Ray (or pistillate) florets more numerous than disc-florets, in 2–5+ series (corollas reduced to narrow laminae or to tubes). Disc corollas barely ampliate, lobes erect. Pappi longer than disc-florets at flowering. x = 7.
Distribution
North America, nw Mexico, Eurasia
Discussion
Species 3 (3 in the flora).
A. G. Jones (1989) segregated Brachyactis from Aster in a broad sense. Recent molecular phylogenetic analyses (J. C. Semple et al. 2002) do not support this relationship, species of sect. Conyzopsis clearly belonging in Symphyotrichum.
Selected References
... more about "Symphyotrichum sect. Conyzopsis"
introrse +
connate +
foliaceous +
distinct +
herbaceous +
scarious +
hirsute +
papillate +
continuous +
withering +
spatulate;oblanceolate elliptic or ovate +
clasping +
indurate +
flowering +
widely ovate;linear +
ribbed +
stigmatic +
persistent +
absent +
at maturity , more or less ampliate , tubes usually shorter +
absent +
2-6-nerved +
dimorphic +
ampliate +
staminate +
straight +
eglandular +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
indeterminate +
surrounding +
campanulate;hemispheric +
4.5mm;5mm +
0.1mm;0.2mm +
alternate +
decurrent +
erect +
scarious +
foliaceous +
2-carpellate +
inferior +
attached +
anatropous +
barbellate +
persistent +
longer +
equal +
tough +
thick +
absent +
connate +
1(-3)-nerved +
persistent +
distinct +
falling +
Phytologia +
1975 +
absent +
sterile +
reduced +
epaleate +
pitted +
flat;slightly convex +
fibrous +
exalbuminous +
modifed +
pistillate +
2;5 +
fertile +
0.1mm;0.2mm +
alternate +
branched +
brittle +
vinelike +
lanceolate +
2-branched +
glabrous +
Symphyotrichum sect. Conyzopsis +
Symphyotrichum subg. Symphyotrichum +
section +
at maturity , more or less ampliate , tubes usually shorter +
maturity +
taprooted +
annual +
green +