260 Trans. Acad. Sci. of St. Louis. 



irregular outline of cell-cavity and small pore-canals, — IV, Lespedeza capi- 

 tata. — V, L. JStuvei. — Vb, L. virginica: thick-walled reserve cellulose of 

 the endosperm. — Vc, L. Stuvei: aleurone layer and remainder of endo- 

 sperm. —VI, Vicia Faba: Malpighian cells with lateral pore-canals. — VIb, 

 Lathyrus venosus : thick-walled aleurone cells; starch grains stratified. — Vic, 

 endosperm cells. 



Plate XVII. — I, Cercis canadensis: osteosclerids not I-shaped; cells of 

 nutrient layer very irregular ; crystals in epidermal cells of the embryo. — lb, 

 lower part of the endosperm. — II, Oalactia pilosa: showing compressed 

 nutrient layer, and the mycotic layer below ; large starch grains in embryo. — 

 III, Amphicarpaea monoica: osteosclerids elongated, I-shaped; aleurone 

 grains in cells of embryo. —IV, Bhynchosia latifolia: endosperm reduced, 

 and epidermal cells smaller than those of the starch layer below ; starch 

 grains large and stratified.- V, Chapmannia Jloridana: testa delicate; e 

 epidermal cells, light line absent; spiral ducts in nutrient layer. 



Plate XVIII. — I, Z)esmant^MS brachylobus: sclerotic cells of nutrient 

 layer thick-walled; cells of the reserve cellulose in lower part of cells 

 smaller; some of the cells of the embryo contain crystals of calcic oxalate. — 

 lb, cuticularizcd layer below cuticle. — II, Gleditschia monosperma: Mal- 

 pighian cells with cuticle and cuticularizcd layer somewhat reduced ; pore- 

 canals extend to the light line; cells of the inner integument expanded 

 after the addition of chloral hydrate; aleurone cells smaller than those of 

 the reserve cellulose. — III, Prosopis juUJlora: conspicuous cuticularizcd 

 layer. — Illb, expanded thin-walled parenchyma cells of the inner integu- 

 ment followed by the thick-walled cells of the nucellus and endosperm. — 

 IIIc, superior face of the two cotyledons, showing palisade cells. — Hid, 

 inferior face of cotyledons; walls of the epidermal cells thickened. — IV, 

 Glitoria serrulata. — V, Schrankia uncinata. 



Plate XIX. — I, Gleditschia triacanthos: the wide cuticularized layer be- 

 low the cuticle ; to the right a single Malpighiau cell. — lb, stratified reserve 

 cellulose of endosperm. — II, Hoffmanseggia Jamesii: the nucellus reduced; 

 endosperm divided into two parts. — lib, embryo. — III, Centrosema virgin- 

 ianum: nutrient layer difiE^'rentiatedinto two parts, nucellus reduced. — IV, 

 Apios tuberosa: endosperm and nucellus reduced; the epidermal cells of 

 embryo smaller than the underlying starch cells; the latter contain small 

 starch grains. — V, Centrosema virginianum: thick-walled reserve cellulose 

 of the cotyledons. 



Plate XX. — I, CUtoria Mariana. — II, Cassia nictitans: thick-walled sclero- 

 tic cells of nutrient layer, followed by the compressed layer of the inner 

 integument. — III, Vigna glabra: nutrient layer compressed; mycotic 

 layer reduced; the endosperm consists of a single row of cells; the epi- 

 dermal cells much smaller than those of the starch layer below. — IV, Cassia 

 Chamaecrista: with two light lines; inner integument compressed or 

 merging into the cells of nutrient layer.— IVb, IVc, isolated Malpighian 

 cells. — I Vd, embryo. — IVe, portion of the Malpighian layer; cells sepa- 

 rating at the light line. — V, Cassia marylandica. — Vb, osteosclerids. 



Plate XXI. — I, Phaseolus lunatus: osteosclerids with lateral projec- 

 tions. — lb, single Malpighian cell, enlarged. — Ic, osteosclerid. — Id, cells 

 of the embryo. — II, Phaseolus multiflorus: spiral ducts in nutrient layer. — 

 lib, Malpighian cells. — He, tangential view of osteosclerids. — lid, pore- 

 canals in cell- walls of mycotic layer. —He, starch grains.- Ilf, striae of 



