54 MALVACE^. 



PLATE 117. Callirrhoe involucrata, Gray; — summit of a prostrate 

 stem, in flower and fruit, from a live plant raised in the Cambridge 

 Botanic Garden, from Arkansan seeds. 



1. Transverse section of a flower-bud, enlarged, showing the aestivation 



and arrangement of parts. (In one instance the petals were seen 

 to be irregularly imbricated in a;stivation.) 



2. Vertical section of the flower, magnified, showing the insertion, &c. 



3. A stamen from the bud, more magnified. 



5. The same, with the anther cut across, showing the normal partition. 



6. Grain of pollen (hispid, as in all Malvaceae), highly magnified. 



7. The gynaecium, enlarged, the rest of the flower cut away. 



8. An ovule detached and magnified. 



9. Receptacle in fruit, with one ripe carpel left in place, magnified. 



10. Magnified transverse section of the receptacle and a portion of the ripe 



carpels ; one of them showing a section of the seed and embryo. 



11. Vertical section of a ripe carpel, seed, and embryo, magnified ; show- 



ing the internal dorsal process, the hollow beak, &c. 



12. A seed detached entire, equally magnified. 



13. An embryo detached entire, showing the way it is curved and the coty- 



ledons folded back upon each other .above, and infolded below, as 

 in most Malvaceae. 

 PLATE 118. Callirrhok pedata; — summit of a flowering branch and 

 a primordial radical leaf, from a live plant raised from Texan seeds 

 {Wright), of the natural size (a small specimen). 



1. Vertical section of a flower, magnified, showing the ovules, &c. 



2. Receptacle with half the ripe carpels in place, magnified. 



3. Posterior view of a ripe carpel, showing the 3-lobed crest, magnified. 



4. Vertical section of the same and of the contained seed, embryo, &c., 



showing the conspicuous dorsal process at the base of the large 

 beak, the at length ascending radicle, &c. 



5. Vertical section of a carpel of Callirrhoe Papaver magnified. 



6. Carpel of Callirrhoe triangulata, enlarged. 



7. Vertical section of the same, showing a less conspicuous internal pro- 



cess below the beak. 



lata, Torr. &,- Gray, Fl. I. c. Nuttallia cordata, LindL Bot. Reff. t. 1938, ex 

 icone. — Tiie figure in tlie Botanical. Register (which I liad wrongly referred to 

 M. triangulata) certainly belongs to the present species, as the naked calyx, the 

 fimbriate edge of tlic petals and their (pink) color sliow. But the radical 

 leaves figured are only the primary ones, and are all undivided. The corolla in 

 this species is less red and considerably larger than that of C. pedata, but small- 

 er than in C. Papaver: the petals are from an inch to an inch and a quarter in 

 lengti), and their whole summit is finely and beautifully Iringed. In the fruit, 

 as in other respects, the species is intermediate between C. pedata and C. Papa- 

 ver, but is abundantly distinct from either. Since these characters have been 

 verified, there is no room to doubt that the Nuttallia digitata figured by Barton 

 truly represents this species, and not the C. pedata, as was assumed in the flora 

 of jV. Jlmcrica. Although it sometimes flowers the first season from the seed, 

 yet the root early becomes iiapiform, or thickened fusiform, and is perennial. 



