COMPOSITE 129 



Tribe IV. SCORZONERE^E. Pappus hairs feathery, often dilated at the base. 

 Receptacle usually naked. 



Outer achenes crowned by a membrane. Beak filiform THRINCIA. 



Achenes contracted at top. Pappus-hairs irregular LEONTODON. 



Achenes contracted at both ends. Plants hispid PICRIS. 



Achenes with filiform beak. Involucre double. Plant hispid, leafy 



HELMINTIA. 

 Achenes compressed. Involucre simple, with 8 connate bracts UROSPERMUM 



Achenes not beaked. Leaves linear, entire, glabrous SCORZONERA. 



Achenes on a hollow support, not beaked. Leaves pinnatifid, glabrous 



PODOSPERMUM. 



Achenes slender. Involucral bracts reflexed at maturity TRAGOPOGON. 



Tribe V. CREPIDEyE. Achenes tapering. Pappus hairs not feathery. Re- 

 ceptacle naked. 



Central achenes beaked. Stem almost naked, many flowered PTEROTHECA. 



Central achenes beaked. Stem naked, i-flowered. Receptacle naked 



TARAXACUM. 



* Achenes usually narrowed below and beaked above. Leafy, glabrous or hispid 

 herbs. 



Achenes rounded, 5-toothed. Stem leafy, many flo%vered CHONDRILLA. 



Achenes compressed, long beaked. Stem leafy, many flowered LACTUCA. 



Achenes subcylindrical, short beaked. Stem leafy, many flowered 



BARKHAUSJA. 



Achenes truncate, not beaked. Flowers bluish or violet PRENANTHES. 



Involucre fleshy, adhering to the achenes. Pappus lateral ZACINTHA. 



Achenes compressed, not beaked. Pappus of soft white hairs SONCHUS. 



Achenes not beaked, with 4-5 rugose ribs. Pappus of soft white hairs 



PICRIDIUM. 

 ** Achenes subcylindric. Involucre of 2 rows. Pappus of soft white simp) e 



hairs CREPIS. 



*** Achenes truncate, attenuated at base, pappus hairs rough, dirty white 



HIERACIUM. 



**** Achenes shorter than the many-haired receptacle. Pappus hairs stiff, 

 brown ANDRYALA 



Sub-family I. CORYMBIFER^. 

 EUPATOR1UML. 



E. cannabinum L. Hemp Agrimony. Stem 3-4 ft. Leaves opposite, 

 3-5 foliolate, leaflets lanceolate, serrate. Heads in dense terminal 5-6-flowered 

 cormybs, whitish-pink or pale purple. Involucral bracts about 10, scarious, linear- 

 oblong, obtuse. Pappus white, scabrous. Corollas covered with resinous points. 



By water-courses and damp places. June-August. 



ADENOSTYLES Cass. 



A. alpina Bluff, et Fing. = A. viridis Cass., is found in mountain woods in 

 the Chens (Var) and in the Maritime Alps. July-August. 



A. albifrons Reichb. with cordate-reniform leaves, white cottony beneath, 

 is common in the Maritime Alps, descending the mountain torrents a consider- 

 able distance. July-August. 



PETASITES Adans. 



P. officinalis Mcench. Butterbur (P. ovatus Hill, 1769). Leaves very 

 large, heart-shaped, whitish pubescent below, long petioled. Involucral bracts 

 very obtuse. Heads of pinkish flowers in an oblong dense panicle, appearing 

 before the leaves. 



Damp places, borders of streams, etc., in the upper valleys, rare, March- 

 April. 



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