. 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 102d meridian. Botany; Botany. 468 COMPOSITAE. Vol. i. Verbesina alba L. Yerbadetajo. Fig. 4439. Verbesina alba L. Sp. PI. 902. 1753. Eclipta erecta L. Mant. 2: 286. 1771. Eclipta procumbens Michx. Fl. Bor. Am. 2 : 129. 1803. Eclipta alba Hassk. PI. Jav. Rar. 528. 1848. Annual, rough with appressed pubescence, erect • or diffuse, 6'-3° high. Leaves lanceolate, oblong-lanceo- late or li
. 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 102d meridian. Botany; Botany. 468 COMPOSITAE. Vol. i. Verbesina alba L. Yerbadetajo. Fig. 4439. Verbesina alba L. Sp. PI. 902. 1753. Eclipta erecta L. Mant. 2: 286. 1771. Eclipta procumbens Michx. Fl. Bor. Am. 2 : 129. 1803. Eclipta alba Hassk. PI. Jav. Rar. 528. 1848. Annual, rough with appressed pubescence, erect • or diffuse, 6'-3° high. Leaves lanceolate, oblong-lanceo- late or linear-lanceolate, acute or acuminate, denticulate or entire, narrowed to a sessile base, or the lower peti- oled, 1'-5' long, 2"-io" wide; heads commonly numer- ous, 3"-6" broad, nearly sessile, or slender-peduncled; rays short, nearly white; anthers brown; achenes 4-toothed, or at length truncate. Along streams, and in waste places, Massachusetts to Illi- nois, Nebraska, Florida, Texas and Mexico. Naturalized from the south in its northeastern range and widely dis- tributed in warm regions as a weed. July-Oct. 59. TETRAGONOTHECA (Dill.) L. Sp. PI. 903. 1753. • Erect perennial mostly branched herbs, with opposite, sessile or connate-perfoliate, broad dentate leaves, and large peduncled heads of tubular and radiate yellow flowers. Involucrfe depressed-hemispheric, its principal bracts 4, large and foliaceous, inserted in I series; inner bracts 6-15, small, subtending the pistillate ray-flowers. Receptacle conic, chaffy, the chaff concave, enwrapping the perfect fertile disk-flowers, the corollas of which are slender and S-toothed. Anthers entire or minutely 2-toothed at the base. Style-branches of the disk- flowers hispid, tipped with elongated appendages. Achenes thick, 4-sided, truncate at the summit. Pappus none, or of several short scales. [Greek, 4-angled-case, referring to the involucre.] Four known species, natives of the southern United States and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
