138 DICOTYLEDONOUS. 



Genus III. LEONTODON. 



Involucre imbricate, with a kw loose scales at the base ; 

 florets perfect; receptacle naked, pappus, stiped. 



1. L. Taraxacum. Scapes several from each root, terete, glabrous, each 

 1-flowered. Leaves allradicle, runcinate, oblong ; segments lanceolate, tooth- 

 ed, slightly hairy when young ; involucrum with numerous leaves, equal, 

 sometimes colored ; scales refiexed. Seeds oblong, angled, pappus stipitate 

 hairy ; receptacle convex 



Yellow. %. March — April. Damp soils. Introduced. 



Genus IV. KRIGIA. {Syn. Cynthia. 



Involucrum many leaved, simple, receptacle naked, pitted, 

 pappus double, exterior one chafTy, short, the interior pilose, 

 rough- Stigmas linear-ligulate. 



1. K. ViRGiNicA. A very small plant, glaucous, the primary leaves nearly 

 round, entire, the rest lirate, nearly glabrous. Scapes glabrous, 1-flowered, 

 becoming elongated by age ; involucrum glabrous. 



Bright yellow. ?D. April — May, Sandy soils. Near Columbia. 



2. K. Caroliniana, Scapes hairy, glandular, long. Leaves runcinate, 

 pinnatifid, or lanceolate, lateral lobes acute, much smaller than the terminal 

 one, sometimes dentate, sprinkled withjointed hairs ; involucrum 10-20-part- 

 ed, with Hnear-lanceolate segments, glabrous. Corolla slightly hairy at the base. 

 Seeds obconic,|striate. Pappus composed of 5 nearly" round scales, and 5 

 scabrous bristles. 



Bright yellow. %. Feb. — April. Sandy soils, common. 



3. K. Dandelion. Scape bearing a few glandular hairs near the sunmiit, 

 slightly glaucous. Leaves oblong, narrow, slightly obovate, secondary leaves 

 linear-lanceolate, long, somewhat glaucous ; involucrum 10-12-parted. 



Yellow. %. April— May. Southern Georgia. 



4. K. Amplexicaulis. tS/em bearing leaves, some what{branched, glaucous; 

 radicle leaves spatulate, lanceolate, dentate, cauline ones somewhat amplexi- 

 caule, lanceolate or ovate *, involucrum generally 12-parted. Flowers solitary, 

 at the extremity of the branches, large, exterior pappus consisting of 8 scales. 



Yellow. %. June — July. Middle & upper dis. of Gar. Ga. 12-14 in. 



'*■■■'""'" Genus V. APARGIA. 



Involucrum many parted, imbricate, with a few appressed 

 scales at the base ; florets perfect ; receptacle dotted. Fruit 

 compressed, somewhat fusiform, pappus plumose, persistent, 

 sessile, pedunculate. 



1. A. Orontium. tSiem erect, branching, hairy. Leaves lanceolate. Flow- 

 ers somewhat spiked ; involucre digitate. 



Yellow. <v). July. 



2. A. Tenellum. Stem simple, glabrous. Leaves opposite, linear, acute. 

 Flowers axillary, on short peduncles ; involucre bell form. Eaton. 



Blue. €>. July, 

 (c.) Lettuce Tribe. Flowers usually yellow, with a milky juice and hitter tastd 



Genus VI. LAGTUCA. 

 Involucre cylindrical, imbricate, scales membranaceous at 



