CARDUACEAE. 289 



1. L. spicata (L.) Kuntze. Stems 6-15 dm. tall, sometimes sparingly hirsute: 

 blades of the lower leaves linear: intermediate bracts of the involucre oblong- 

 ovate; inner bracts 8-9 mm. long, broadly linear: corollas 6.5-7.5 mm. long; 

 lobes glabrous. — S. Frequent, in low grounds. — Schists, serpentine. — Fall. 



2. L. squarrosa (L.) Hill. Stems 1-4 dm. tall, pubescent: blades of the lower 

 leaves linear: inner bracts of the involucre 15-22 mm. long, acuminate: 

 corollas 24-27 mm. long; lobes pubescent within. — S. Eare in thickets, — 

 ScJtists. — • Sum. 



7. KUHNIA L. Perennial pubescent herbs. Leaves alternate: blades 

 narrow, resinous-dotted. Heads in open or compact clusters. Involucres 

 narrow-cylindric. Corolla narrowly funnelform, the tube and throat scarcely 

 distinguishable: lobes triangular to lanceolate. Anther-appendages ovate, 

 obtuse. Aehenes columnar, striate. Pappus of many capillary bristles. 



1. K. eupatorioides L. Stems 5-10 dm. tall: leaf -blades 2-10 cm. long, nar- 

 rowed at the base and sessile or nearly so: inner bracts of the involucre 

 linear, 5—7 mm. long: corollas about 6 mm. long: aehenes 4-5 mm. long. — 

 M. Common, on rocky banks of the Conestoga near Lancaster. — Limestones. 

 — Sum. and fall. — False-boneset. 



8. CHE.YSOPSIS Nutt. Biennial or perennial pubescent herbs. Leaves 

 alternate: blades narrow or broad, mostly entire. Heads solitary or in a 

 terminal corymb. Involucres ovoid to turbinate, the bracts narrow. Eay- 

 flowers with conspicuous ligules. Disk-corollas with a narrow funnelform 

 throat. Anther-appendages lanceolate. Stigmas subulate. Aehenes flattened. 

 Pappus double, of numerous bristles, 



1. C. mariana (L.) Nutt. Stems cobwebby-villous, 1-6 dm. tall: blades of 

 the cauline leaves spatulate to elliptic or oblong: inner bracts of the involucre 

 narrowly linear, somewhat acuminate, 8-9 mm. long: filaments shorter than the 

 anthers : disk-corollas 8—9 mm. long : ligules oblong, 6-9 mm. long. — S. 

 Rather common, in dry soil. ■ — ■ Schists. — Fall. — Golden-aster. 



9. OLIGONEURON Small. Perennial herbs, pubescent at least in the 

 inflorescence. Leaves alternate: blades entire or nearly so. Heads in a 

 terminal corymb. Involucres campanulate, several-flowered: bracts broad, 

 rounded at the apex, the inner much longer than the outer. Ray-flowers few: 

 corollas with a very long tube and a yellow ligule. Disk-corollas with a funnel- 

 form throat and a shorter tube : lobes lanceolate. Filaments nearly as long 

 as the anthers or longer. Stigmas oblong or ovate-oblong. Aehenes stout, 

 ribbed. Pappus of many capillary bristles. 



1. O, rigidum (L.) Small. Stems 4-15 dm, tall, rough-pubescent: leaf -blades 

 thick, those of the upper stem-leaves oblong to ovate, 2-13 cm. long, closely 

 pubescent, shallowly toothed or essentially entire: bracts of the involucre 

 pubescent, the outer ovate: disk-corollas 5.5-6.5 mm. long: aehenes 12-15- 

 ribbed. — W. S. Common, in dry soil, Nat, of w, N. A. — Fall. 



10. EUTHAMIA Nutt. Perennial herbaceous plants. Leaves alternate: 

 blades elongate, herbaceous. Heads many, in corymbs. Involucres narrow, 

 few-several-flowered: bracts various, the outer ones linear or nearly so. Ray- 

 flowers few: corolla with a slender tube and a very small ligule. Disk-corollas 

 with a funnelform throat, and tube of about equal length: lobes lanceolate. 

 Anthers as long as the filaments or longer. Stigmas lanceolate. Pappus of 

 capillary bristles. 



Lancaster County Flora 19. 



