. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. 1821. Erect, hirsute or pubescent, branching herbs, with alternate, mostly dentate leaves, andrather large heads of both discoid and radiate yellow flowers, generally solitary at the endsof the branches. Involucre hemispheric or broadly campanulate, its bracts imbricated inseveral series, the outer shorter. Receptacle flat, alveolate. Ra3-flowers pistillate. Disk-flowers perf
. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. 1821. Erect, hirsute or pubescent, branching herbs, with alternate, mostly dentate leaves, andrather large heads of both discoid and radiate yellow flowers, generally solitary at the endsof the branches. Involucre hemispheric or broadly campanulate, its bracts imbricated inseveral series, the outer shorter. Receptacle flat, alveolate. Ra3-flowers pistillate. Disk-flowers perfect, or some of them only staminate. Style-branches flat, their appendageslanceolate or triangular. Achenes pubescent, obtuse, those of the ray-flowers thick, thoseof the disk-flowers flattened. Pappus of the ray-flowers obsolete or of a few caducous bristles,that of the disk-flowers of an inner row of numerous capillary rough bristles, and an outerrow of shorter stouter bristles or scales. [Greek, dififerent-case, from the dissimilar achenes.] Five or 6 species, natives of the southern United States and Mexico, the following typical. I. Heterothecasubaxillaris (Lam.) Britton & Riisby. Heterotheca. Fig. Inula Lam. Encycl. 3: 259. 1799. Heterotheca Lamarckii Cass. Diet. Sci. Xat. 21 : 1S21. 131- Heterotheca subaxillaris Britton & Rusby, Trans. X. Sci. 7:10. 1887. Biennial or sometimes annual, i°-3° high. Basaland lower leaves petioled, ovate or oblong, 2-^long, the upper ones oblong, sessile or clasping,smaller, all acutish or obtuse, dentate; heads rathernumerous, 6-9 broad ; involucre nearly hemispheric,3-5 high, its bracts linear, or slightly dilated above,the inner with scarious margins; rays 10-25, innerbristles of the pappus of the disk-flowers about 2long. In dry soil, Delaware to Florida, Louisiana, Kansas,Arizona and Mexico. In ballast, at Philadelphia. July-Sept. 14. CHRYSOPSIS [Xtitt.] Ell. Bot. S. C. & Ga. 2: 333. 1824.[DiPLOGON Raf. Am
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
