CARDUACEAE. ] 87 



1. M. batatifolia DC. I'laiits glabrous: leaf-blades deltoid to hastate-ovate, 

 1-3 cm. long, entire or repand : heads in small irregular clusters: bracts of the 

 involucre 3-4 mm. long: corollas about 3 mm. long. [FFillugbaeya hetero- 

 l)hylla Small.] — Everglades. — F. K. {Bah., Cuba, Ant.) 



2. M. cordifolia (L.) Willd. Plants densely pubescent: leaf-blades ovate to 

 hastate, 6-15 cm. long, coarsely toothed or lobed: bracts of the involucre 7-8 

 mm. long: corollas about (i mm. long. — Hammocks. — F. K. {Cuba, Ant.) 



6. LACINIAKIA Hill. Typically simple-stenmied herbs with thick root- 

 stocks. Leaves alternate, often numerous: blades narrow, entire. Heads borne 

 in spikes, racemes, panicles, or rarely in cymes. Involucre ovoid to cylindric or 

 turbinate. Corolla-throat narrow-funnelform, much longer than the slightly 

 narrower tube: lobes lanceolate. Anther-appendages entire or notched. Achene 

 short, ribbed. Pappus of many barbelate or plumose bristles. — Buttox- 



SNAKEROOT. BLAZING- STAR. 



Bracts of the involucre obtuse : heads peduncled. 



Involucres narrowed at the base, turbinate. 1. L. gracilis. 



Involucres rounded at the base, campanulate. 2. L. laxa. 



Bracts of the involucre acute or acuminate : heads sessile. 



Bracts of the involucre abruptly pointed : corollas less than 



1 cm. long: authers reaching the corolla-lobes. .'J. L. luevif/ata. 



Bracts of the involucre acuminate : corollas over 1 cm. long : 



anthers far down in the tube. 4. L. Chapmunii. 



1. L. gracilis (Pursh) Kuntze. Stems 2-10 dm. tall, cinerous-pubescent : 

 blades of the lower leaves linear: inner bracts of the involucre linear, 5-6 mm. 

 long, obtuse. — Pinelands. 



2. L. laxa Small. Stems 4-6 dm. tall, thinly tomentulose: blades of the lower 

 leaves linear: inner bracts of the involucre narrowed at the tip, 4-5 mm. long: 

 achenes mostly over 3 mm. long. — Coastal sand-dunes. 



3. L. laevigata (Xutt.) Small. Stems 6-14 dm. tall, glabrous or nearly so: 

 blades of the lower leaves narrowly linear: inner bracts of the involucre 8-9 

 mm. long: corollas 8-9 mm. long: filaments pubescent, fully * as long as the 

 anthers.^ — Pinelands. — F. K. 



4. L. Chapmanii (T. & G.) Kuntze. Stems 2-6 dm. tall, tomentose: blades of 

 the lower leaves narrowly linear, mostly less than 10 cm. long: inner bracts of 

 the involucre 11-13 mm. long, acuminate: achenes 5.5-6 mm. long. — Pinelands. 



7. CARPHEPHORUS Cass. Simple-stemmed herbs. Leaves alternate: 

 blades narrow, flat, or acerose, entire. Heads in a terminal corymbose cyme. 

 Involucre hemispheric to campanulate. Corolla-throat narrowly funnelform, 

 longer than the slightly narrower tube: lobes lanceolate. Androecium included: 

 anther-appendages mostly notched. Stigmas filiform. Achene ribbed. Pappus 

 of many capillary bristles. 



1. C. coiymbosus (Kutt.) T. & G. Stems 3-9 dm. tall, pubescent: leaf-blades 

 spatulate or oblong-spatulate below to cuneate, oblong, or ovate above: inner 

 bracts of the involucre 5-7 mm. long, erose: corollas about 8 mm. long. — 

 Pinelands. 



8. KUHNIA L. Perennial herbs. Leaves alternate: blades narrow, 

 resinous-dotted. Heads borne in open or compact clusters. Involucre narrow- 

 cylindric. Corollas narrowly funnelform, the tube and throat scarcely dis- 

 tinguishable: lobes triangular to lanceolate. Anther-appendages ovate, obtuse. 

 Achenes columnar, striate. Pappus of many capillary bristles. 



