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EXPLANATION OF PLATE XXXVIL 



L The Houseleek Tribe. — L A twig of White Sfonecrop (Se- 

 dum album) in flower. — 2. A flower magnified. — 3. A view of the 

 carpels and the scales at their base, the remainder of the flower being 

 cutaway. — 4. One of the scales very highly magnified. — 5. A calyx-cup. 

 — 6. A carpel, more magnified. — 7. A ripe fruit, surrounded by the 

 withered remains of the calyx and petals. — 8. A view of a portion of 

 the inner edge of a ripe carpel, shewing the manner in which the seeds 

 are attached to its edges. — 9. A seed. — 10. The same cut across to 

 shew the cotyledons. — 11. The embryo. 



IL The Saxifrage Tribe. — 1. A tuft of Three-Jingered Saxi- 

 frage (Saxifraga tridactylites). — 2. A flower magnified. — 3. The 

 same divided longitudinally, shewing the situation of the stamens, and 

 the interior of the ovary with its two styles. — 4. A transverse section 

 of the ovary. — 5. A stamen. — 6. A ripe seed-vessel. — 7. The same 

 divided longitudinally, to shew the placenta, to which a few seeds are 

 still seen hanging. — 8. 9. Seeds. — 10. A seed divided lengthwise, with 

 the embryo lying in the midst of albumen. 



