306 



QCHORIACEAE. 



VOL. III. 



2. LAPSANA L. Sp. PI. 811. 1753. 



Annual erect branching herbs, with alternate dentate or pinnatifid leaves, and small 

 panicled slender-peduncled heads of yellow flowers. Involucre nearly cylindric, its principal 

 bracts in I series, nearly equal, with a few exterior small ones at the base. Receptacle flat, 

 naked. Rays truncate and 5-toothed at the apex. Anthers sagittate at the base. Style- 

 branches slender. Achenes obovate-oblong, 2O-3o-nerved, somewhat flattened, narrowed 

 below, rounded at the summit. Pappus none. [Greek, lampsana, the name of a crucifer.] 



About 9 species, natives of the Old World, the following typical. 



i. Lapsana communis L. Nipplewort. Succory 

 Dock-cress. Fig. 4043. 



Lapsana communis L. Sp. PI. 811. 1753. 



Stem paniculately branched, glabrous above, more or- 

 less hispid-pubescent below, i-3J high. Lower leaves 

 ovate, repand-dentate, obtuse, thin, pubescent, or glabrate, 

 petioled, 2'-^' long, often with 2-6 lobes on the petiole, 

 the uppermost oblong or lanceolate, sessile, acute, much 

 smaller, mostly entire; heads very numerous, 3"-6" broad; 

 involucre oblong-cylindric, 2"-$" high, and of about 8 

 linear glaucous principal bracts and several very small 

 outer ones. 



Along roadsides and in waste places, Quebec and Ontario 

 to New Jersey, Pennsylvania and Michigan. Also on the 

 Pacific Coast and in Jamaica. Naturalized from Europe. 

 Called also bolgan-leaves, ballogan. June-Sept. 



3. SERINIA Raf. Fl. Ludov. 149. 1817. 

 [APOGON Ell. Bot. S. C. & Ga. 2 : 267. 1824.] 



Low glaucescent branching annual herbs, with alternate clasping entire or lobed leaves, 

 or those of the stem sometimes appearing as if opposite, and few small long-peduncled heads 

 of yellow flowers. Involucre broadly campanulate, its bracts about 8, equal, membranous, 

 becoming concave after flowering. Receptacle flat, naked. Rays truncate and 5-toothed at 

 the apex. Anthers sagittate at the base. Style-branches slender. Achenes obovoid, 

 8-io-ribbed, contracted at the base, rounded at the summit. Pappus none, or a mere vestige. 

 [Greek, small chicory.] 



Three known species, natives of \\\e southern United States, 

 the following typical. 



i. Serinia oppositifolia (Raf.) Kuntze. Sermia. 

 Fig. 4044. 



Krigia oppositifolia Raf. Fl. Ludov. 57. 1817. 

 Apogon humilis Ell. Bot. S. C. & Ga. 2: 267. 1824. 

 Serinia oppositifolia Kuntze, Rev. Gen. PI. 364. 1891. 



Glabrous throughout, or slightly glandular-pubescent along 

 the ends of the peduncles, branched from the base, 4'-io' 

 high. Basal and lower leaves petioled, oblong-lanceolate or 

 spatulate in outline, acute or obtuse, entire, lobed or pin- 

 natifid, 3'-5' long, 2"-6" wide ; upper leaves mainly sessile, 

 clasping, alternate, or appearing as if opposite, usually entire, 

 smaller; peduncles very slender, sometimes 4' long; heads 

 ii"-2" broad; bracts of the involucre acute or acuminate, 

 about the length of the rays. 



Kansas to Texas, east to North Carolina and Florida. Recorded 

 from Missouri. March-May. 



4. KRIGIA Schreb. Gen. PI. 532. 1791. 



An annual herb, with scapose stems, basal, entire, sinuate-dentate or pinnatifid leaves, 

 and a small or middle-sized head of yellow flowers, solitary at the end of the scape. Invo- 

 lucre campanulate, its herbaceous bracts 9-18, reflexed in fruit, in 2 series, with no exterior 

 shorter ones. Receptacle flat, naked. Rays truncate and 5-toothed at the apex. Anthers 

 sagittate at the base. Style-branches slender, obtusish. Achenes turbinate, 15-20-ribbed, 

 truncate. Pappus in 2 series, the outer of 5 thin broad rounded scales, the inner of 10 or 

 more slender naked bristles. [In honor of David Krig, who collected plants in Maryland 

 early in the eighteenth century.] 



A monotypic genus of North America. This and the two following genera were included in 

 Adopogon Neck., in our first edition, but that genus is not typified, and the name probably belongs 

 to an Old World plant. 



