DICOTYLEDONS. 231 



4. L. SPICATA Lam. Spiked Lobelia. Biennial or perennial; 

 stem pubescent, simple, 1-3 ft. high ; lower leaves oval to obovate, 

 obtuse at the apex, denticulate, narrowed below to the short petiole, 

 upper leaves smaller, lanceolate, sessile; raceme long and dense; 

 pedicels short; bracts linear; flowers small, pale blue; calyx tube 

 smooth, shorter than the lobes, without appendages ; corolla ^^ in. 

 long. June-August. On dry, sandy soil. 



123. CICHORIACE^. CHICORY FAMILY. 



Annual or perennial herbs ; juice milky, usually acrid and 

 bitter ; leaves alternate or basal ; flowers in a close head 

 which is surrounded by an involucre consisting of 1 or more 

 rows of bracts; the receptacle naked or with chaffy scales, 

 nearly smooth or pitted, flat or convex ; flowers perfect ; the 

 calyx tube adnate to the ovary, the limb sometimes wanting, 

 but usually prolonged above into a pappus of scales, bristles, 

 or fine hairs which are often plumose ; corolla tubular below, 

 prolonged above into a strap-shaped or ligulate ray which is 

 usually 5-toothed at the apex ; stamens 5, inserted in the 

 tiibe of the corolla, the anthers united into a ring about the 

 slender, 2-lobed style ; ovary 1-celled ; fruit an acliene. 



T. SERINIA. 



Annual; stem branching, glaucous; leaves lanceolate to 

 linear, entire or lobed, petioled or sessile ; flowers yellow, in 

 long-peduncled heads ; the involucre spreading in flower, 

 connivent in fruit, usually of 8 equal bracts about as long as 

 the corollas; receptacle naked; achenia ovoid-oblong, ribbed 

 and striate, pappus none. 



S. opposiTiEoM A (rviif.) Kuiit/.r. Skkima. Stem very glau- 

 cous, succulent, branched below, [-\\1 in. liigh ; lower leaves lanceo- 

 late, entire or ])innatifid, long-pt'tioled, the upper narrower and 

 usually entire, clasping, the two higliest often nearly o])posite; pedun- 

 cles long and slfiider, often glan<hdar-])ubescent near the apex ; heads 

 10-20-flovvered; rays truncat*', .'j-loothcd at the apex. Marcli -May. 

 In dry, open fields. 



