CENTATJEBA. 199 



usually (perhaps always) radiant. 8y. E. B. 707. C. nigrescem 

 (Bab.). The plant when seen is easily distinguishable from 

 the radiant form of C. nigra, although hardly to be separated 

 by characters. — Meadows and pastures. (3. South of England, 

 rare. P. VI.— IX. E. S. I. 



** Phyll. lanceolate, tlieir upper half toith a somewhat scarioiis 

 deeply toothed or fringed decurrent margin. 



2. C Cy'anus (L.); phyU. erect adpressed deeply toothed, 

 pappus as long as the fruit, I. linear-lanceolate, the lowermost 

 toothed or pinnatifid. — B. B. 277. — St. 1 — 3 feet high, loosely 

 cottony, leafy. L. slightly cottony above, densely beneath. 

 Involucre greenish yellow ; phyll. often tinged with" purple in 

 their upper half, margins brown decurrent with whitish teeth. 

 Heads with large radiant hluejlowers, disk purple. — Corn-fields. 

 A. VI.— Vm. Corn BluebottU. E. S. I. 



3. C. Scabidsa (L.) ; phyll. erect adpressed, the triangular- 

 ovate black pectinate appendages not covering the inv., teeth 

 ascending setaceous short, pappus as long as the fruit, /. pinna- 

 tifid roughish, segments lobed with hard points. — JH. B. 56. — 

 St. 2 — 3 feet high, rough, furrowed. L. hispid, lobes of the 

 upper ones entire. Headi on long naked stalks, solitary. In- 

 volucres usually rather wooUy ; phyll pale, with dark acute 

 membranous pectinate decurrent appendages ; teeth paler, short, 

 not longer than 5 the width of the phyUary. Fl. purple, outer 

 row radiant or 0. Karely the inv. is quite covered by the 

 appendages. — Fields and hedges. P. VH. — IX. Great Knap- 

 weed. Matfellon. E. S. I. 



[C panicvluta (L.) ; phyll. erect adpressed rigid with subulate 

 teeth and a short term, rigid point innermost narrow long toothed 

 at the end, pappus much shorter than the fruit, lower 1. pinna- 

 tifid with linear segments. — R. xv. 780. — St. about a foot high, 

 panicled above, rough, rather cottony. Heads cylindric-oblong. 

 Fl. purplish. — Quenvais and St. Ouen's Bay, Jersey. B. VH.] 



*** Phyll. homy at tlie end, spines palmate or pinnate. 



J:4. C. solstitidlis (L.) ; phyll. woolly palmately spinous, central 

 spine of the intermediate ones very long needle-shaped, inner 

 ones with a roundish scarious appendage, heads termitud solitary, 

 st. winged with the decurrent bases of the linear-lanceolate entire 

 hoary leaves, root.-l. lyrate.— ^. B. 243.--St. 1—2 feet high, 

 branched, spreading. Involucres sometimes glabrous. Fl. 

 yellow. — Cultivated land, probably introduced. A. VH. — ^IX. 

 Yellow Star-thistle. E. 



5. C. Ctdcitrdpa (L.) ; phyll glabrous palmately spinous, cen- 

 tral spine strong cJianneUed, innermost phyll. with a scarious blunt 



