86 LKTTER XXXIII. 



minute embryo lying in the base of the albumen. 

 These characters, independently of all others, distinctly 

 separate the Sun-dews as a peculiar tribe. What the 

 plants really are, to which they are most nearly related, 

 is still an unsettled point. Violets, Saxifrages, Fran- 

 kenias, have been respectively selected ; but there are 

 objections to all those natural groups. It is probable 

 that the true affinity of the Sun-dews is with Side- 

 saddle Flowers, most curious plants inhabiting the 

 marshes of North America. 



EXPLANATION OF PLATE XXXIII. 



I. The Tamarisk Tribe. — 1. A iwig of French Tamarisk (Ta- 

 marix gallica). — 2. A flower, magnified. — 3. A calyx seen in profile, 

 with the stamens and ovary, the petals being removed. — 4. An ovary, 

 with the bases of the five stamens grown into a sort of cup, and sur- 

 rounding it. — 5. An anther, with a portion of the filament. — 6. A 

 section of the ovary, shewing how the ovules rise from a convexity in 

 the bottom. — 7. A section of the convexity (or placenta), shewing that 

 It is not single but triple. — A. Ripe fruit of the German Tamarisk 

 (Myricaria geimanlca) ; a a the withered petals \h hh the valves of the 

 capsule. — B. A seed of the same. — C. it sembryo. 



II. The SuN-DKVV Tribe. — 1. A. t^\z.\\\. oi Round-leaved Sun-dew ; 

 a a young scape, rolled up in a circlnate manner ; h a young leaf before 

 expansion. — 2. A magnified leaf, showing the glandular hairs. — 3. A 

 glandular hair, very highly magnified. — 4. The lower end of a leaf- 

 stalk, with the stipulary fringe. — 5. A flower, magnified. — 6. A section 

 of the ovary, exhibiting the parietal placentation ; a a stigma. — 7. A 

 ripe capsule. — 8. A seed, very highly magnified; — 9. its kernel. — 10. 

 The same divided lengthwise, and exhibiting the embryo at the base of 

 fleshy albumen. 



