Pammel — Anatomical Characters of Seeds of Leguminosae. 157 



sisting of elongated, thick-walled cells, with cell-cavity much 

 reduced. 



Embryo. First row of cells of embryo smaller than under- 

 lying, with thickened outer walls. Cells below with small 

 intercellular spaces. Reserve material consists of fat and 

 protein grains; starch is absent. — (Iowa City, Iowa, Hitch- 

 cock, Mo. Bot. Gard.) 



Dalea laxiflora, Pursh. (JParosela enneandr a, 'Nuit.f Britt.) 



PL XII. f. 7. 



Structurally much as in the last species. Testa and endo- 

 sperm 130-180 /^ in thickness. Malpighian cells 42 ^ long; 

 nearly colorless, with a large chromatophore in the cell- 

 cavity ; several conspicuous pore-canals extend from the 

 surface, somewhat beyond the light line. Osteosclerids are 

 thick-walled and wide at the base; the intercellular space 

 larger above than below. Nutrient layer as in the last species. 

 The aleurone cells of endosperm thick-walled ; the remainder, 

 except the internal layer, consists of mucilaginous reserve 

 cellulose. Embryo as in D. alopecuroides. 



Petalostemon, Michx. {Kuhnisiera, Lam.) 



Seeds with endosperm. Malpighian cells yellowish, with a 

 large cavity and chromatophores. 



Petalostemon CANDiDus, Michx. {E. caMcZ2Wa, WiUd., Kze.) 



PI. XII. /. 6-6b. PI. XXVIII. f. 4-4c. 



Testa and endosperm 90-110 /x in thickness, the latter vari- 

 able, but strongly developed laterally. 



Malpighian. Cells are 33 /* long. Cuticle forms an even 

 and continuous layer; the cuticularized layer foUows; light 

 line occurs under a narrow and distinct zone of the latter ; 

 pore-canals project into the walls somewhat below the light 

 line but are indistinct. Cell-cavity wide at the base and grad- 

 ually tapering upward ; the large chromatophore colors brown 

 with iodine. Cell-walls color blue with chlor-iodide of zinc; 

 the light line pale blue with the same reagent. The cuticular- 

 ized layer readily separates above the light line. 



Osleosclerid. Cells are elongated, with long intercellular 



