Lapsanastrum

J. H. Pak & K. Bremer

Taxon 44: 19. 1995.

Etymology: Lapsana, generic name, and Latin - astrum, indicating inferiority or an incomplete resemblance
Treatment appears in FNA Volume 19. Treatment on page 254. Mentioned on page 216, 255, 257.
 TaxonIllustrator 
FNA19 P20 Chondrilla juncea.jpegChondrilla juncea
Ixeris stolonifera
Lapsanastrum apogonoides
Bee F. Gunn
Bee F. Gunn
Bee F. Gunn

Annuals [biennials], 10–20 cm; taprooted [occasionally stoloniferous]. Stems 1–20+, prostrate, simple or sparingly branched distally, slender, glabrous. Leaves basal and cauline; petiolate or sessile; basal blades oblanceolate, lyrate-pinnately lobed (lateral lobes relatively wide, terminals relatively large); cauline relatively few, reduced. Heads in loose, corymbiform arrays or borne singly. Peduncles not inflated, minutely bracteate or naked. Calyculi of 2–4 scalelike bractlets (to 1 mm, equal), glabrous. Involucres cylindro-campanulate, 4–8 mm diam. Phyllaries 5 [–7] in 1 series, broadly to narrowly lanceolate, equal, margins not scarious, apices acute to acuminate, faces glabrous. Receptacles ± flat, smooth, glabrous, epaleate. Florets 5–8; corollas yellow (glabrous [pubescent]). Cypselae golden brown, oblong, adaxially flattened, (often 2-winged with 1–2 apical hooklike projections [hooks 0 in some species]), not beaked, ribs 10–13, ciliate; pappi 0. x = 8.

Distribution

Introduced; Asia

Discussion

Species 4 (1 in the flora).

Members of Lapsanastrum were formerly included in Lapsana. Cladistic analysis by J. H. Pak and K. Bremer (1995) indicated that they are distinct from Lapsana communis and are more closely related to Youngia, supporting their recognition as a distinct genus.

"fine" is not a number.

... more about "Lapsanastrum"
acute;acuminate +
scarious +
ovate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
David J. Bogler +
J. H. Pak & K. Bremer +
lobed +  and oblanceolate +
decurrent +
compound +  and simple +
tuberculate +, rugose +, muricate +  and smooth +
scale-like +
filiform +
zygomorphic +, actinomorphic +  and (3-)5-merous +
golden brown +
flattened +  and oblong +
Lapsana, generic name, and Latin - astrum, indicating inferiority or an incomplete resemblance +
winged +  and beaked +
dispersed +
indeterminate +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cylindro-campanulate +
sessile +  and petiolate +
cauline +  and basal +
divided +, lobed +  and dentate +
not scarious +
2-carpellate +
naked +  and bracteate +
not inflated +
connate +  and distinct +
subequal +  and unequal +
flat;convex +
pak1995a +
10 +  and 13 +
exalbuminous +
branched +  and simple +
prostrate +  and ascending +
1 +  and 20 +
slender +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Lapsanastrum +
Asteraceae tribe Cichorieae +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
shrub +  and subshrub +