Vol. III.] 



BEIXFLOWER FAMILY. 



261 



12. Lobelia Nuttallii R. & S. Nuttall's Lobelia 



Lobelia gracilis Nutt. Gea. 2: y-. 181S. Not .\ndr. 

 Lobelia Nultallii R. &. S. Sj-st. 5: 39. 1819. 



.\nnual, or perhaps biennial, glabrous throughout, 

 or puberulent below; stem weak, usually reclining, 

 very slender, loosely branched, at least when old,i°-3° 

 long. Basal Idves spatulate to oval, obtuse, mostly 

 petioled, 6"-i2"long, slightly repaud, or entire; stem 

 leaves distaut, linear, linear-oblong, or slightly spatu- 

 late, longer and narrower, entire or sparingly glan- 

 dular-denticulate; flowers 2j<"-4" long, pale blue, 

 loosely racemose; bracts linear or the upper subulate; 

 pedicels filiform, 2"-4" long, naked, or minutely 2- 

 bracteolate near the base; calj'x-lobes subulate, longer 

 than the depressed-hemispheric strongly ribbed tube, 

 the sinuses unappendaged; capsule depressed-globose, 

 half-inferior, about i" long. 



In sandy soil, New Jersej- and Pennsylvania to Florida 

 and Georgia. June-Sept. 



13. Lobelia Canbyi A. Gray. Canby's 

 Lobelia. (Fig. 3512.) 



Lobelia Canbyi A. Gray, Man. Ed, 5, 284. 1867. 



Annual, slightly puberulent, usually glabrous; stem 

 erect, slender, paniculately branched, or simple, 2°-3° 

 high. Stem leaves linear or linear-oblong, >^'- 1 J-i' long, 

 yz"-\y2" wide, the lower obtuse, sometimes slightly 

 repand-denticulate, the upper acute, narrower, entire; 

 flowers racemose, blue, 4"-5,'/2" long; lower bracts lin- 

 ear, the upper subulate; pedicels erect or ascending, 

 naked, filiform, i"-y long; calyx-lobes linear-sub- 

 ulate, glandular-denticulate, equalling or somewhat 

 longer than the narrowly turbinate tube, mostly shorter 

 than the tube of the corolla; capsule oblong-turbinate, 

 2" long, shorter than the calyx-tube. 



Swamps, New Jersey to South Carolina. July-Sept. 



Family 41. 



CICHORIACEAE Reiclienb. Fl. Excuns. 248. 1831. 

 Chicory F.^milv. 



Herbs (two Pacific Island genera trees), almost always with milky, acrid or 

 bitter juice, alternate or basal leaves, and j'ellow, rarely pink, blue purple or 

 white flowers in involucrate heads (anthodia). Bracts of the involucre in i to 

 several series. Receptacle of the head flat or flattish, naked, scaly (paleaceous) 

 smooth, pitted, or honeycombed. Flowers all alike (heads homogamous), 

 perfect. Calyx-tube completely adnate to the ovary, its limb (pappus) of 

 scales, or simple or plumose bristles, or both, or wanting. Corolla gamopetal- 

 ous, with a short or long tube, and a strap-shaped (ligulate) usually 5-toothed 

 limb (raj')- Anthers connate into a tube around the style, the sacs sagittate or 

 auricled at the base, not tailed, usually appendaged at the summit, the simple 

 pollen-grains usually 12-sided. Ovary i -celled; ovule i, anatropous; style very 

 slender, 2-cleft, or 2-lobed, the lobes minutely papillose. Fruit an achene. 

 Seed erect; endosperm none; radicle narrower than the cotyledons. 



About 6$ genera and 1400 species, of wide geographic distribution. The family is also known 

 as LlGtTLlFLORAE, and is often regarded as a tribe of the Ci i.mposit.ve. 



¥- Pappus of scales, or of scales and bristles, or none isee No. 18}. 

 Flowers blue or white; pappus of blunt scales. 

 Flowers yellow. 



Bracts of the involucre membranous, or herbaceous. 

 Pappus none; achenes 20-30-nerved. 

 Pappus none; achenes 8-io-ribbed. 



Pappus of rounded scales, with or without an inner series of bristles. 

 Bracts of the involucre thickened and keeled after flowering; pappus none. 

 -It '.^ Pappus, at least some of it, of plumose bristles. 

 Receptacle chaffy. 

 Receptacle naked. 



Plume-branches of the pappus not interwebbed. 



Flowers yellow; plants scapo.se, the leaves basal. 

 Flowers yellow; plants leafy-stemmed. 



I. Cichoriunt. 



2. jMpsana. 



3. Serinea. 



4. Adopogon. 

 .s. Arnoseris. 



6. Hypochaeris. 



I^eontodon. 

 Picris. 



