242 SUMMER FLOWERS. 



(108) Eryngium. Eryngo. 



* Scales of the receptacle three-lohed. 



E. maritimum : stems stiff, erect, mucli branched, nearly a 

 foot high, glabrous, bluish or glaucous; leaves stiff, broad, 

 sinuate, divided into three broad, short lobes, elegantly veined, 

 bordered by coarse prickly teeth, the radical ones stalked, the 

 rest stem-clasping j flower-heads nearly globular, pale blue, 

 with an involucre of 5-8 small narrow leaves resembling those 

 of the stem. — Sea Holly. — Sandy sea-coasts. Fl. July, August. 



** Scales of tlie receptacle entire. 



E. campestre : stems erect,, a foot high, more slender and 

 branched than in the last; leaves 2-3 times pinnatifid, with 

 lanceolate lobes, waved, coarsely toothed, bordered and termi- 

 nated by strong prickles ; flower-heads more numerous, smaller, 

 the involucral leaves purplish, pinnately toothed. — Ballast-hills 

 near Plymouth, by the Tyne, etc. Fl. July, August. 



(109) Cicuta. CowBANE. 



C. virosa : stem hollow, somewhat branched, 3-4 feet high; 

 leaves twice ternate, with large narrow-lanceolate acute un- 

 equal-toothed segments; general umbels of 10-15 or more 

 rays, the partial involucres with numerous subulate bracts. — 

 Water Hemlock. — Ditches and edges of lakes and rivers. Fl. 

 August. 



(110) Apium. Celery. 



A. graveolens: stems rather slender, branched, furrowed, 

 glabrous, 1-2 feet high ; leaves pinnate, with 3-5 broad cre- 

 nate or three-lobed segments ; umbels small, nearly sessile 

 on the upper branches opposite the leaves, or on very short 



