Lagophylla

Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 390. 1841.

Etymology: Greek lago, hare, and phyllon, leaf, alluding to sericeous leaves of original species
Treatment appears in FNA Volume 21. Treatment on page 260. Mentioned on page 254, 255, 259, 263, 294.
 TaxonIllustrator 
FNA21 P42 Lagophylla ramosissim.jpegLagophylla ramosissima
Layia platyglossa
Layia glandulosa
Barbara Alongi
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey

Annuals, 8–100 (–150) cm. Stems ± erect. Leaves mostly cauline; proximal opposite, most alternate; ± sessile; blades narrowly elliptic to linear or (proximal) oblanceolate to spatulate, margins usually entire (proximal sometimes toothed), faces hirsute to strigose, sericeous, or villous (all or distal sometimes stipitate-glandular as well). Heads radiate, in ± paniculiform arrays or in glomerules. Peduncular bracts: pit-glands, tack-glands, and/or spines 0. Involucres ± hemispheric or obovoid to obconic, 3–6+ mm diam. (sometimes subtended by calyculi of 2–5 bractlets). Phyllaries 5 in 1 series (linear to oblanceolate, herbaceous, each wholly enveloping a subtended ray ovary, abaxially piloso-hirsute to hirtellous or scabrellous). Receptacles flat to convex, densely hirtellous, paleate (paleae in rings between rays and discs, distinct or proximally connate, scarious). Ray-florets 5, pistillate, fertile; corollas yellow (often nerved with red to purple abaxially). Disc-florets 6, functionally staminate; corollas yellow, tubes shorter than funnelform throats, lobes 5, deltate (anthers ± dark purple; styles glabrous proximal to branches). Ray cypselae ± obcompressed (attachments basal, apices beakless, faces glabrous); pappi 0. Disc cypselae 0; pappi 0. x = 7.

Distribution

w North America

Discussion

Species 4 (4 in the flora).

Molecular phylogenetic data have indicated that Lagophylla is sister to Layia (S. Carlquist et al. 2003). Members of Lagophylla are easily overlooked in the field; leaves usually wither before flowering and heads often close at midday. Ray laminae often shrivel greatly in pressed specimens (making lengths difficult to assess). The species are moderately interfertile (W. C. Thompson 1983); most do not co-occur and no natural hybrids have been documented.

Key

1 Leaves grayish (the distal stipitate-glandular abaxially, glands whitish or yellowish; plants otherwise eglandular); heads in paniculiform arrays or in glomerules; calyculi of 2–5 bractlets;phyllaries piloso-hirsute on angles; ray laminae 3–6 mm (plants self-compatible) Lagophylla ramosissima
1 Leaves green or gray-green (the distal eglandular or stipitate-glandular, glands yellow, golden, or purple; plants otherwise eglandular or stipitate-glandular on distal stems); heads in paniculiform arrays; calyculi 0 or of 2–5 bractlets; phyllaries hirtellous to scabrellous or piloso-hirsute on angles; ray laminae 7–13 mm (plants strongly or weakly self-incompatible) > 2
2 Branching excurrent; distal leaves stipitate-glandular, glands yellow or golden; calyculi of 3–5 bractlets; involucres obconic; phyllaries hirtellous to piloso-hirsute on angles,hairs 0.3–1+ mm, ± patent to antrorsely curved Lagophylla glandulosa
2 Branching ± pseudo-dichotomous (main stems ± zigzag); leaves usually eglandular (the distal eglandular or stipitate-glandular, glands mostly purple, some yellow); calyculi 0, or of 2–3 bractlets; involucres ± hemispheric to obovoid; phyllaries ± hirtellous to scabrellous or piloso-hirsute on angles, hairs 0.1–1+ mm, ± antrorsely curved > 3
3 Phyllaries 4–5 mm, piloso-hirsute on angles, hairs 0.5–1+ mm; cypselae glossy Lagophylla minor
3 Phyllaries 4–6.5 mm, ± hirtellous to scabrellous on angles, hairs 0.1–0.6 mm; cypselaedull Lagophylla dichotoma
... more about "Lagophylla"
not tailed +, rounded +  and obtuse +
pale +  and dark +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
umbelliform +, spiciform +, paniculiform +, glomerulate +  and corymbiform +
indeterminate +  and determinate +
Bruce G. Baldwin +  and John L. Strother +
Nuttall +
decurrent +
compound +  and simple +
hirsute +  and strigose sericeous or villous +
lobed;usually spatulate;oblanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
hairy +  and glabrous +
fusiform +, clavate +, obpyramidal +, terete +, compressed +  and obcompressed +
fertile +  and bisexual +
fertile +  and bisexual +
w North America +
Greek lago, hare, and phyllon, leaf, alluding to sericeous leaves of original species +
hirsute +  and strigose sericeous or villous +
oblanceolate;spatulate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
less hemispheric or obovoid;obconic +
petiolate +  and sessile +
alternate +  and opposite +
deltate +
hirsute +  and strigose sericeous or villous +
oblanceolate +  and spatulate +
2-carpellate +
persistent +
alternate +  and opposite +
Trans. Amer. Philos. Soc., n. s. +
obcompressed +
flat;convex +
thompson1983a +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Lagophylla +
Asteraceae (tribe Heliantheae) subtribe Madiinae +
cylindric +
toothed +  and entire +
100 cm1,000 mm <br />1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
8 cm80 mm <br />0.08 m <br /> (100 cm1,000 mm <br />1 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
shrub +  and subshrub +