Compositae. 87 



380 Bracts lanceolate spreading, C. hnceolatus. 



380 Bracts adpressed, ....... C. palustris. 



381 Leaves not prickly, .... C. heterophyllus. 



381 Leaves prickly, 382 



382 Heads sessile, stem very short, ..... C. acaulis. 

 382 Heads peduncled, 383 



383 Peduncles long, C. pratensis. 



383 Peduncles short, C. eriophorus. 



Car'duus erioph'orus (46). 7 — 9. Stem stout 3 — 5 ft. not winged, leaves 

 (802) I — 2 ft. pinnate cottony beneath, heads 2 — 3 in. diameter, involucre 

 globose woolly, bracts very many ciliated ending in a slender prickly 

 point. [Rg. C. CI. 



CAR'DUUS TENUIFLO'RUS (70). 5—9. Stem 1—4 ft. cottony 

 .(798) winged, wings wavy prickly, leaves pinnatifid prickly, flower-heads 



numerous sessile fascicled small oblong, bracts subulate with recurved 



spines. Sandy waste places ^ especially near the sea. 



CAR'DUUS NUTANS (73). Musk Thistle. 5—9. Bracts of the in- 

 (799) volucre lanceolate with the outer ones spreading, stem i — 3 ft. high 



grooved interruptedly winged, heads crimson i — 2 in. diameter. 



Waste places. 



CAR'DUUS CRIS'PUS (87). Welted Thistle. 6—8. Stem 1—3 ft. 

 with continuous wings, heads purple or white \ — | in. diameter in 

 clusters, bracts very slender erect. Waste places, 



CAR'DUUS MARIA'NUS. Milk Thistle. 7—8. Leaves large sessile am- 

 (812) plexicaul waved with strong stout spines, spines of the involucre strong 

 and recurved, heads purple i — 2 in. diameter. Waste places. 



CAR'DUUS LANCEOLA'TUS (112). Spear Thistle. 7—10. Bracts 

 (801) numerous lanceolate spreading spiny, leaves \ — i ft. long obovate 

 lanceolate pinnatifid with few bifid lobes armed with long stout spines, 

 heads few purple f — i^ in. diameter. Waste places. 



CAR'DUUS PALUS'TRIS (112). Marsh Thistle. 7—8. Stem 2-4 

 (863) ft. high branched winged very spiny, heads dark purple f in. diameter 

 in leafy clusters, bracts purplish green adpressed. Wet nieadowSy etc. 



CAR'DUUS ARVEN'SIS (112). Creeping Thistle. 7—8. Dioecious 

 {809) staminate and pistillate plants in separate patches, stem angled and 

 grooved but not winged, involucre ovoid with adpressed ovate bracts, 

 leaves pinnatifid wavy, flowers purple. Waste places everywhere. 



Car'duus heterophyl'lus (51). Melancholy Thistle. 7—9. Stem 2— 3 ft. 

 (807) high furrowed not winged, leaves soft, upper ones sessile ovate cordate 

 at the base, heads purplish-red \\ — 2 in. diameter, bracts adpressed. 



[G. (Stackhouse, Peizor.) 



