. 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. ower, notsignificant.] About 30 species, natives of warm and tropical regions. Type species: SpUanthes urens Jacq. I. Spilanthes repens (Walt.) Fig. 4441. Antheniis repens Walt. Fl. Car. 211. repens Michx. Fl. Bor. Am. 2: 131. ainericana repens A. H. Moore, Proc. Am. : 547. 1907. Perennial, usually rooting at the lower nodes;st
. 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. ower, notsignificant.] About 30 species, natives of warm and tropical regions. Type species: SpUanthes urens Jacq. I. Spilanthes repens (Walt.) Fig. 4441. Antheniis repens Walt. Fl. Car. 211. repens Michx. Fl. Bor. Am. 2: 131. ainericana repens A. H. Moore, Proc. Am. : 547. 1907. Perennial, usually rooting at the lower nodes;stem slender, simple or branched, spreading orascending, 8-2° long, pubescent, or nearly gla-brous. Leaves ovate to lanceolate, petioled, acuteor acuminate at the apex, or the lower obtuse,coarsely toothed, or nearly entire, i-3 long;heads long-peduncled, solitary at the end of thestem and branches, 6-io broad; bracts of theinvolucre oblong to oblong-lanc.^olate, obtuse oracute; rays 8-12, yellow; receptacle narrowlyconic; achenes oblong, most of them roughenedwhen mature and hispidulous; pappus of i or 2very short awns, or none. In moist or wet soil, Missouri to Texas, east toSouth Carolina and Florida. 61. RUDBECKIA L. Sp. PI. 906. 1753. Perennial or biennial (rarely annual), mostly rigid, usually rough or hispid herbs, withalternate undivided lobed or pinnatifid leaves, and large long-peduncled heads of tubular(mostly purple) and radiate (yellow) flowers. Involucre hemispheric, its bracts imbricatedin 2-4 series. Receptacle conic or convex, with chaffy concave scales subtending or envelop-ing the disk-flowers. Ray-flowers neutral, the rays entire or toothed. Disk-flowers perfect,fertile, their corollas S-lobed. Anthers entire or minutely 2-mucronate at the base. Style-branches tipped with hirsute appendages. Achenes 4-angled, obtuse or truncate at the coroniform, sometimes of 2-4 short teeth, or none. [In honor of Claus Rudbeck,1630-1702, Swedish anato
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
