268 COMPOSITE. [Bidfng. 



? 4. A. cterulescens, L. Bluish- or Lavender-leaved Mugwort. 

 " Leaves hoary most of them lanceolate undivided tapering at the 

 base, lower ones variously lobed, heads 3-flowered oblong-cylin- 

 drical spicate, scales of the involucre hoary subcarinate." — Br. Fl. 

 p. 230. E. B. t. 2426. Gerarde, Em. p. 1104, fig. 3. A. marina, 

 Htids. : Fl. Angl. ed. 2da, p. 359. 



On the sea-coast ; a very doubtful native. Fl. August, September. !(.. 



On the coast of Brading harbour, near Bradstone, B. T. W., but where I have 

 sought it without success. 



This species has been introduced into the British Flora on the authority of 

 Gerarde and of Tofield, but, although the old herbalist mentions it as a native of 

 the opposite coast of Hampshire (Portsmouth), he does not, as Sir J. Smith would 

 lead us to suppose, tell us of its actually growing in the Isle of Wight, an error 

 which seems to have originated with Smith, and from him to have been copied into our 

 late British Floras. Yet in Mr. Snooke's little work above ([noted a specific loca- 

 lity is assigned to A. cjerulescens within the island, for the origin of which I am 

 unable to account, not finding it recorded in any other book, nor is any authority 

 subjoined for its insertion. It is not therefore unfair to presume, that supposing 

 Gerarde and Tofield to have really found this now apparently extinct species, yet, 

 as careful search has been instituted by succeeding botanists for its re- discovery, 

 without success, in our own time, the probability is that the station I now give is 

 erroneous, some form of .4. maritima, possibly the Ydx. gallica, having been mis- 

 taken for it. 



WW Receptacle paleaceous. Pappus of 2 — 5 stiff bristles. 



XIX. BiDENS, Lmn. Bur Marigold. 



" Pappus of 2 — 5 persistent awns, which are rough with minute 

 deflexed prickles. Receptacle chaffy. Involucre of many scales ; 

 the outer ones or bracteas often leafy. (Heads sometimes ivith a 

 neuter ray)." — Br. Fl. 



The species of this genus are very widely dispersed over the globe.* 



1. H. cernua, L. Nodding Bur Marigold. "Flowers droop- 

 ing, bracteas lanceolate entire (longer than the involucre), leaves 

 lanceolate serrated undivided, bristles of the fruit about 3 erect." 

 — Br. Fl. -p. 228. £. B. t. 1114. 



/3. Much smaller, stem simple. B. minima, Z. : Fl. Dan. ii. t. ^\2 ; Dill, in 

 Ray's Syn. 



In and about shallow ditches, drains, ponds and other watery places. Fl. July 

 — September. Fr. October, November. 0. 



E. Med. — Plentiful in ditches on Sandown level, especially about the skirts of 

 Lake common. Abundant in a ditch behind Merry Garden, near Shanklin. 

 Alverston, in the wet ditches below the lynch. Plentiful in the drains of the wet 

 meadow by the West side of Langbridge. In ihe stream by Budbridge, and else- 

 where to the N. and N.E. of Godshill. 



W. Med. — Wet places about Brixlon, as at White-Court farm, &c. Common 



* 1 observed a discoid Bidens very common in moist pastures and by roadsides 

 in the lowlands of Trinidad and other West-India islands. B. chrysantha, with 

 white radiate flowers, is a troublesome weed in the cane-pieces of Jamaica, the 

 foreign species of the genus appearing less aquatic than our own. 



