SYNGENESIA— POLYGAMIA-vEQU. Sonchus. 3U 



1 . S. cceruleus. Blue Sow-thistle. 



Flower-stalks and calyx bristly, racemose. Leaves some- 

 what lyrate; their terminal lobe triangular and very 

 large. 



S. Cffiiuleus. Camtr. Epit. 28 1 ./. Fl. Br. 815. Engl. Bot. v. 34. 



t.242b. Hull'2.27. Hook. Scut. 226. 

 S. caeruleus latifolius. Bauh. Hist. v. 2. 1005. /". 1006. 

 S. canadensis. Linn. Sp. PL 1115. Wilh. 6/4. Original specie 



men from Kalm in the Linucean Herbarium. 

 S. alpin us. mild. n. 3. 1 5 1 9. Wahlenb. Lapp. 1 94. Huds. 336. 



Fl. Dan. t. 1 82. Frcelich in Ust. Annul, v. 1. 24. 

 S. n.20. Hall. Hist. v. 1.9. 

 S. flore caeruleo. Ger. Em. 294./. 



On the Highland mountains of Scotland, but rare. 



On Loch-na-gore, Aberdeenshire, and on the Clova mountains. 

 Mr. G. Don. 



Perennial. July, August. 



Root tuberous and woody, slightly creeping. Stems upright, a 

 yard high, round, simple, leafy, furrowed ; smooth in the lower 

 part ; besprinkled above with prominent, brown, glandular, viscid 

 hairs. Leaves smooth, pliant, variou-sly lyrate ; arrow-shaped 

 at the base, with a -winged footstalk ; their terminal lobe large, 

 triangular, somewhat toothed j their under side a little glaucous. 

 Fl. large, numerous, and handsome, of a fine blue, composing a 

 simple, terminal cluster, whose stalks, as well as the linear brac- 

 teas, and the calyx, are clothed with copious, brown, glutinous, 

 bristly hairs. Anth. red. Seeds compressed, striated. Down 

 rough. 



Wallis, by a strange mistake in his History of Northumberland, 

 was the cause of this fine alpine plant being reckoned by Hud- 

 son a native of Britain ; but what Wallis took for it is the Ci~ 

 chorium Intybus. The Blue Sow-thistle however remains on our 

 list, having been discovered in the Highlands by the late Mr. 

 Don. It abounds on the principal mountains of Europe, from 

 Lapland to Switzerland. Some botanists contend that this is 

 the real S. alpinus of Linnaeus, and the accurate Dr. Wahlen- 

 berg declares it to be the Lapland plant so denominated ; what 

 is preserved under that name in the Linnaean herbarium, and 

 figured in Sm. Plant. Ic. t.2\, not being known to him as a 

 native of Lapland. This last species however alone answers to 

 the character in the Sp. Plantarum, and cannot but remain as 

 the real S. alpinus. All ambiguity is avoided by retaining the 

 old appellation of ceeruleus for our plant. 



2. S. palustris. Tall Marsh Sow-thistle. 

 Flower-stalks and calyx bristly, somewhat umbellate. Leaves 



runcinate, rough-edged ; arrow-shaped at the base. 



