Neonesomia

Urbatsch & R. P. Roberts

Sida 21: 252. 2004.

Common names: Goldenshrub
Etymology: For Guy L. Nesom, b. 1945, American botanist, avid researcher of Asteraceae
Treatment appears in FNA Volume 20. Treatment on page 85. Mentioned on page 5.
 TaxonIllustrator 
FNA20 P08 Neonesomia palmeri.jpegNeonesomia palmeri
Thurovia triflora
Amphiachyris dracunculoides
Yevonn Wilson-Ramsey
Barbara Alongi
Barbara Alongi

Shrubs, 20–300 cm (evergreen). Stems erect to ascending, abundantly branched, glabrous or sparsely hairy, usually resinous. Leaves cauline; alternate; sessile; blades (midveins prominent) elliptic to narrowly oblanceolate, margins entire (apices obtuse to acute, sometimes apiculate), faces sparsely to moderately hairy, minutely glandular, resinous. Heads radiate, borne singly or in cymiform or racemiform clusters at branch tips, in loose paniculiform arrays. Involucres turbinate [campanulate], (4–5 [–6] ×) 3–5 [–7] mm. Phyllaries 18–24 in 3–4 [–5] series (mostly tan), 1-nerved (midnerves expanded, forming green to brownish subapical patch; flat to slightly convex), narrowly elliptic to lanceolate or obovate [linear], unequal, chartaceous, margins scarious (entire or lacerate), (apices acute to obtuse or rounded), faces glabrous, resinous. Receptacles convex, pitted, epaleate (pit borders short-scaly or with 1–3 awns to 1.5 mm, mostly associated with central florets). Ray-florets 5–11 [–15], pistillate, fertile; corollas white to pale [or darker] yellow (laminae elliptic to narrowly lanceolate). Disc-florets 8–15 [–20] bisexual, fertile; corollas white to pale [or darker] yellow, tubes (cylindric to slightly dilated distally) shorter than mostly turbinate throats, lobes 5, spreading to recurved, triangular (unequal); style-branch appendages narrowly triangular. Cypselae (tan) elliptic to obovoid, ± turbinate, 8–10-nerved, hairy; pappi persistent, of 40–50 whitish or tan, barbellulate, apically attenuate bristles in 1 series. x = 9.

Distribution

Tex., n Mexico

Discussion

Species 2 (1 in the flora).

Neonesomia johnstonii (G. L. Nesom) Urbatsch & R. P. Roberts is known only from Mexico (San Luis Potosí).

Phylogenetic analyses (L. E. Urbatsch et al. 2003) demonstrated the distinctness of Neonesomia palmeri from Ericameria and Xylothamia.

Selected References

None.

Lower Taxa

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

... more about "Neonesomia"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
Lowell E. Urbatsch +, Roland P. Roberts +  and Kurt M. Neubig +
Urbatsch & R. P. Roberts +
decurrent +
compound +  and simple +
elliptic;narrowly oblanceolate +
rugulose +  and muricate +
tan +  and whitish +
Goldenshrub +
not 2-lipped +  and actinomorphic +
white +  and pale yellow +
beaked +, 2-ribbed +  and 5-ribbed +
turbinate +, elliptic +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Tex. +  and n Mexico +
For Guy L. Nesom, b. 1945, American botanist, avid researcher of Asteraceae +
resinous +
glabrous +  and hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
racemiform +  and cymiform +
cluster +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
spreading;recurved +
triangular +
2-carpellate +
persistent +
narrowly elliptic +  and lanceolate or obovate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
resinous +
erect +  and ascending +
hairy +  and glabrous +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Neonesomia +
Asteraceae tribe Astereae +
turbinate +
perennial +, biennial +  and annual +