298 



PLANT LIFE. 



l)crome filled with i-eser\'e food, constituting then the so-called 

 cndospL'rin ; around this is the renniant of the sporangium, 

 when more than a mere membrane, likewise stored with tood, 

 and called \.\\>^ perispiym ; while Q\er all is the hardened in- 

 tegument or testa, often of unlike layers, /, li, Hi. 



404. Fruit. — In the conifers the sporophylls hearing the 

 ovules and the axis from which they arise also grow. -\s the 

 ovule is becoming the seed each sporo])h_\dl enlarges, but 



especiallv the ])lacental out- 

 growth (see \ 334), fnid the 

 whole numlier. together with 

 the enlarged axis, forni the 

 cviie (fig. 341, 35S). Some- 

 times (as in the junipers) the 

 sporophylls become fleshy and 

 adherent, forming a berry-like 

 ,r body. 



I'] 



Fig. :;4 



Fig. 341. — A inaUire cr>iie nf a pine {/'nnis syh't'stris), the upper quarter ent a\v.sy. 

 .1'^, sq' , the placental scales ; ^, seeds ; cm, embryo in a seed. last below the pla- 

 cental scale which bears the lower seed i', may be seen part of the carjiellary scale 

 in section. Magnified about 2 diam. — From !'.essev. 



Fig 342. — A placental scale of pine (/'. svi-'cxt ris) seen from abcive ; showing two 

 winged seeds in place, /)/, micropyle ; , /;. limit of seed ; tiic parts beyond are flat 

 wings, formed by tile splitting off of a layer of tissue from the surface of tile scale. 

 Magnitied about 3 diam. — I'Vorn Bessey. 



