260 



Professor Henslow's Examination 



Comparative view of the external characters of the three plants 

 represented in Plates XV. and XVI. 



Purpurea. 



Hybrida (purpureo-lutea'). 



Lutea. 



Biennial. 



3 — 5 feet. 

 \\ — 3 feet, 

 less secund, and 

 laxer. 



woolly, 

 very soft. 



crenato-dentate. 



petiolate, oblong. 



broader and shorter, 



longer than the 

 Calyx and fre- 

 quently than 

 the bracteas. 



large, cernuous. 



I. 



more spreading. 



broader. 



Plate XV. 



Root. Perennial, according to Koelreuter, 

 and apparently so in the present instance, 

 the plant having thrown out several offsets. 



Stem. About 3\ feet. 



Raceme. About ll feet. 



secund, dense, nodding above. 



Leaves. Nearly smooth above, quite woolly 

 below. Somewhat soft. 



Dentate. 



radical, sub - petiolate, broadly -lanceolate, 

 Fig. 2. 



caulinar, sessile, narrower. 

 Bracteas ; Lanceolate. 



Pedicels. About the length of the Calyx, 

 and and somewhat shorter than the brac- 

 teas. 



Flowers, medium size, nearly horizontal. 



Plate XVI. 



II. 



1. Calyx, moderately spreading in flower, 

 afterwards connivent. 



a. sepals, ovato-lanceolate, the odd one much 

 narrower. 



Bi-tri-ennial. 



2 — 3 feet. 



1* feet. 



4 



denser. 



glabrous, 

 firmer. 



dentate. 



somewhat nar- 

 rower. 



narrower & longer, 

 shorter than the 



Calyx and much 



shorter than the 



bracteas. 

 small, more 



drooping. 



. HI 



less spreading, at 

 length more 

 closed. 



narrower. 



* If a general rule for naming Hybrids should be thought advisable, perhaps it will 

 be found convenient always to prefix the name of the plant which supplies the pollen to 

 that which furnishes the ovule. 



