EXPLANATION OF THE PLATES. 399 



on a conical receptacle, enclosed in an ovate and at length 

 3-valved spathe, wliicli is borne on a short scape ; both 

 figures the natural size; 115, a detached sterile flower 

 magnified. 



12, Platanthera fimbriata, Lindl., a flower, natural size ; 

 12(2, upper portion of the pistil with part of the spur, and 

 the 2 anther-cells, which are consolidated with the stigma ; 

 125, pollen-mass with its stalk ; both figures magnified. 



13, Agave Yirginica, a small flower, natural size. 



PLATE XIY. 



1, Lophiola aurea, a flower of natural size. 



2, Iris cristata, the summit of the style, w^ith the three 

 petal-like stigmas, and two of the stamens reduced in size. 



3, Medeola Virginica, a flower, natural size. 



4, Smilax herhacea, a long-peduncled lunbel of flowers 

 of a sterile plant ; 4^^, a berry ; both the natural size ; 45, 

 a staminate flower, magnified. 



5, Trillium cemuum, the pistil; 5^^, the beny; 55, 

 cross-section of the berry, all of the natural size ; 5c, a 

 diagram of the flower, exhibiting the pistil in the centre, 

 the six stamens around^ and the two whorls of perianth- 

 leaves. 



6, Dioscorea villosa, part of a raceme in fruit, natural 

 size. 



7, Clintonia borealis, two flowers, the rest of the umbel 

 cut away, natural size. 



8, Streptopus amplexifolius, a flower of natural size; 

 8(1, a sepal with a stamen ; 85, the pistil ; both magnified. 



9, Erythronium, a flower of natural size. 



10, Uvularia, a flower of natural size. 



11, Juncus articulatus, the summit of the stem in flower; 

 11a, a flower; 115, the pistil; both magnified. 



