244 



niPSACEyE 



prominent, spinous uiiicr hyacis ; involi(^el 4-angled ; cnlyx-luhe 

 cup-shaped; ptiah 4, unequal. (Name from the Greek dipsao, 

 I thirst, in ahusion to the water whiclf .'usually collects in the 

 hollows formed liy the i)airs of united leaves. This serves as a 

 moat to prevent uisects crawling up the stem to steal the honey 

 in the llowers, wJ-iich is destined for flying insect visitors who will 



carry pollen from flower 

 -^ to flower.) 



I. IJ. sylvesli'is (Wild 

 Teazle).- A stout ).lant, 

 3 — 6 feet high, with an 

 erect prickly stem ; 

 large, bright green 

 'leaves, which arc prickly 

 underneath and united 

 at the l)ase ; heads 

 large, conical, co\'ered 

 Avith straight bristles ; 

 iiivolucye curved up- 

 wards ; flmcers lilac, 

 expanding in one or two 

 bands half-wav up the 

 head and then both 

 downwards and up- 

 wards. — ^\'aste places ; 

 common. — V\. July — 

 September, llicnnial. 



2.* D. F alio II II 111 

 (Fuller's Teazle) differs 

 from D. svlveslris mainly 

 in ha\-ing a more cylin- 

 drical /,'(■(;(/, a reflexed 

 involuere, and hooked 

 bristles on the receptacle. 

 It is not known out of 

 ciilti\-ation, except as an 

 occasinnal escape, and 

 is probal)ly only a form of /'. syh'eslris. 



3. 1). l^ilnsiis (Small Tea/le, She|iherd's Rod).— Smaller than 

 D. svlveslris in all its pnrls, rough with bristles ; leaves stalked, 

 with a small leaflet at the base on each side ; lieads small, nearly 

 globose, drooping in bud ; invahiere reflexed ; fhncers wliite. — 

 Moist shady jilaces ; not common. — Fl. August, September. 

 Biennial. 



:)< (Ifi/,/ yv.i.;.',). 



