THE GENERAL, CHARACTERS OF SEEDS 



437 



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» ft 



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3** 



Figure 279A 



Figure 279B 



Fig. 279. A. Forked Catchfly (.Silene dichotoma) . a, seed enlarged; b, nat- 

 ural size. 



B. Night-flowering Catchfly (Silene noctiflora) . A, side view of a seed; B, 

 edge view of the same, showing the scar-cavity. C, a longitudinal section 

 of a seed, showing the embryo curved about the endosperm. D, the nat- 

 ural size of the seeds. 



(.\fter Hillman ; A, Bull. Mich. Agr. Exp. Sta., B, Bull. Nev. Agr. Exp. Sta.) 



Xight-flowering Catchfly {Silene noctiflora L.). 



Seeds kidney-shaped, thick, with rounded edges, one-fifteenth to 

 one-tenth in. in length ; surface roughened by peculiar tubercles ; on 

 shorter side a black elevated scar; immature seeds red. Found in 

 clover and grass seed. 



Figure 280A 



Fio. 280. A. Evening Catchfly (.Silene vesrertina). 

 B. Evening Catchfly (Lychnis alba). 



(Drawings by L. R. Collins and Ada Hayden.) 



Evening Catchfly {Silene vespertina Sibth.). 



Seed smaller than that of S. noctiflora, which resembles it, one- 

 fifteenth of an in. in length; ash-colored. Found in alfalfa and 

 clover seed. 



