258 Trans. Acad. Sci. of St. Louis. 



ducts, a' = epidermal cells of cotyledons, cr = crystals. 

 liy= hilar grooA^e above tracheid island. 



Plate VII. — I, Baptisia leucantha: light line close to the cuticle; osteo- 

 sclerids large; remnauts of the nucellus present; epidermal cells of embryo 

 smaller than those of parenchyma ; fat globules and protein grains in cells. — 

 II, Thermopsis caroliniana: nutrient layer and nucellus as in Baptisia; 

 endosperm difEerentiated into three parts. — lib, lower part of endosperm. — 

 lie, embryo, epidermal cells, and parenchyma. 



Plate VIII. — I, Melilotus officinalis: prominent conical points above the 

 light-line. — lb, palisade cells of the embryo, upper face. — Ic, a single 

 cell of the endosperm with thick walls; small starch grains in embryo. — II, 

 Melilotus alba: small starch grains in the embryo; thick-walled endosperm 

 cell shown below the embryo. — III, Medicago lupulina: — Illb, some- 

 what rhomboidal osteosclerids more magnified. — lY , Medicago denticulata: 

 secondary and tertiary walls dissolved; small starch grains in the embryo. — 

 IVb, single I-shaped osteosclerid. — V, Melilotus officinalis: general longi- 

 tudinal view of the seed; osteosclerids, spongy parenchyma of the nutrient 

 layer, endosperm, and two cotyledons. 



Plate IX. — I, Lripimis pusillus : cuticle and cuticularized layer above the 

 light-line; several chromatophores in Malpighian cells; spiral duct in the 

 nutrient layer; nucellus present; endosperm reduced. — II, Trifolium 

 agrarium: — lib, cells of embryo. — III, Lupimis albus, — IV, Lupinus sp. 

 figure traced from Malpighius, Anatom. Plant. — V, Trifolium reflexum: 

 endosperm of thick- walled cells; small starch grains in embryo. — VI, 

 Trifolium pratense: chromatophores in cell-cavity; thick-walled endosperm 

 cells. — VIb, embryo. 



Plate X. — I, Sopliora sericea. — lb, cells of embryo with small starch 

 grains. — Ic, lower part of the endosperm. — II, Genista tinctoria: thick- 

 walled endosperm cells. — lib, cells of embryo. — lie, aleurone grains in 

 cells. — III, Cytisus scoparius: thicked- walled endosperm cells and a com- 

 pressed layer next to the embryo, — IV, Crotalaria sagittalis: nutrient 

 layer divided into two parks. — V, Cladrastis tinctoria: conspicuous cuticu- 

 larized layer above the light line; thick-walled reserve-cellulose of the 

 endosperm with pore-canals. 



Plate XL — I, Psoralea floribimda : osteosclerids much compressed. — lb, 

 a more enlarged view of the osteosclerids ; mycotic layer well developed, 

 brown; remnants of the nucellus at n'. — II, P. cuspidata: compressed nutri- 

 ent layer below the osteosclerids; mycotic layer well developed, brown. — 

 lib, cells of the cotyledons with aleurone grains o' ; intercellular space at 

 i. — III, Amorpha canescens: cell-walls of the endosperm thick; the epider- 

 mal cells of the embryo smaller than those of the parenchyma below. — 

 Illb, palisade cells of the embryo, superior face. — IV, P. melilotoides : 

 cell-walls of the osteosclerids thick; mycotic layer much reduced. — IVc, 

 cells of the embryo with protein, fat, and small starch grains. — V, Hosackia 

 PursWarja: reserve cellulose of endosperm with thick-walled cells. — Vb, 

 embryo with palisade cells of the superior face of the cotyledon. — VI, 

 Amorpha fruticosa: chromatophores in the Malpighian cell; the osteosclerids 

 followed by the nutrient layer. — VIb, walls of the aleurone layer greatly 

 thickened; cells of the lower part of the endosperm with thin walls. 



