22G PORTULACACE.&. 



Etymology obscure : probably an unmeaning name. 



Geographical Distribution. A tropical and subtropical genus ; with 

 the exception of T. teretifolium, which extends northward to Pennsylvania, 

 and a nearly allied species in Arkansas. 



PLATE 98. Talinum (Phemeranthus, Raf.) teretifolium, Pursh; — 

 plant of the natural size, cultivated in the Cambridge Botanic Gar- 

 den, from Westchester, Pennsylvania, Darlington. 



1. Diagram of the aestivation, &c, with a transverse section of the ovary 



near the base, showing the incomplete dissepiments. 



2. Vertical section of the ovary and receptacle, &c, magnified. 



3. Pistil and receptacle entire, equally magnified. 



4. A stamen, magnified, inside view. 



5. Same, seen from the outside. 



6. An ovule, more magnified. 



7. A capsule, enlarged ; the valves just separating. 



8. The same, more dehiscent, showing the seeds packed on the placenta. 



9. A magnified seed. 



10. The same, vertically divided, showing the coiled embryo. 



