Lagascea

Cavanilles

Anales Ci. Nat. 6: 331. 1803.

Common names: Doll’s-head acuate silk-leaf velvet-bush
Etymology: For Mariano Lagasca y Segura, Spanish botanist at the Madrid Botanical Garden
Treatment appears in FNA Volume 21. Treatment on page 136. Mentioned on page 135.

Shrubs [annuals, perennials], to 50–100[–300] cm. Stems erect [ascending to decumbent], branched from bases or ± throughout. Leaves cauline; opposite; petiolate [sessile]; blades 3-nerved, lance-ovate to ovate [lanceolate to oblanceolate], bases broadly cuneate [to subauriculate], margins ± serrate, faces usually sericeous to strigose or glabrate, often stipitate-glandular. Heads discoid, borne in headlike glomerules (of [8–]30–50+, 1(–2)[–8]-flowered heads, glomerules borne singly or in ± corymbiform [racemiform] arrays). Involucres cylindric, 1–2 mm diam. (glomerules of heads usually subtended by leaves or ± foliaceous bracts). Phyllaries persistent, 4–5[–8+] in ± 1 series (linear-attenuate, proximally connate, often 1 or more with 1[–3+] glands in abaxial face). Receptacles convex (often hirtellous), rarely paleate (paleae linear). Ray florets 0. Disc florets 1(–2)[–8], bisexual, fertile; corollas yellow [white, pink, or red], tubes shorter than cylindric to campanulate throats, lobes 5, lance-linear to lance-ovate [rounded-deltate] (often hairy). Cypselae (brown to black) narrowly cylindric to obovoid or clavate (faces glabrous or pilosulous, minutely grooved); pappi ± coroniform. x = 17.

Distribution

sw United States, Mexico, Central America (to Nicaragua), introduced in West Indies, South America, Asia (India, Java, Sri Lanka, Thailand), Africa, Pacific Islands (Hawaii).

Discussion

Species 8 (1 in the flora).

Lagascea mollis Cavanilles, now a nearly pantropical weed, was collected at Apalachicola, Franklin County, Florida (Chapman, n.d., presumably ca. 1860), evidently from an ephemeral population, probably from ballast.

Lower Taxa

... more about "Lagascea"
Elizabeth M. Harris +
Cavanilles +
Doll’s-head +, acuate +, silk-leaf +  and velvet-bush +
sw United States +, Mexico +, Central America (to Nicaragua) +, introduced in West Indies +, South America +, Asia (India +, Java +, Sri Lanka +, Thailand) +, Africa +  and Pacific Islands (Hawaii). +
For Mariano Lagasca y Segura, Spanish botanist at the Madrid Botanical Garden +
Anales Ci. Nat. +
harris1994a +, stuessy1976a +  and stuessy1978a +
Undefined (tribe Undefined) subtribe Lagasceinae +
Lagascea +
Asteraceae (tribe Heliantheae) subtribe Helianthinae +