12 ANALYTICAL ARRANGEMENT OF BOTANICAL TERMS. 
Aril, covering exterior to the integuments (not in the 
ovule) (May-apple, Water-lily). 
Coma, i: tuft of hairs on certain seeds (Silkweed). 
This is to be distinguished from Ppappus, which is a 
tuft on the fruit (Achenium), 
Tay 
(2.) Parts oF NUCLEUS; Q a 
e- 
Embryo (e), the initial plantlet. 
P 
Radicle (r), CLS the rudimentary stem or first inter- 
node, 
Cotyledon (c), the seed leaf at the primary node. 
Plimudle ( p), the growing points above the cotyledons, 
Albiimen (a), @: the food for the plantlet’s first 
growth, stored outside the embryo. 
Tt, 
Kinds. —(1.) GENERAL Form: Orthotrogous, Q: cam- 
he 
pylétropous(en))} anttropous, " amphitropous, 
- aes 
i mG 
> same as in ovule. 
™ 
(2.) FormM OF COVERING: 
Conformed, adhering closely to nucleus. 
Cellular, loose (Pyrola). 
Winged, (7 having expanded appendages (Catalpa). 
Woolly, covered closely with fibers (Cotton). 
iN 
Conse, with coma at the end (Willow Herb). 
(3.) TEXTURE OF ALBUMEN: 
Farinaceous, mealy (Wheat). 
Oily, mealy but mixed with oil (Poppy). 
Muciléginous, like mucilage (Morning-glory). 
Ruminated, wrinkled (Papaw). 
(4.) NUMBER OF COTYLEDONS: 
er 
Monocotylédonous, Qycm. 
P 
Dicotylédonous, Cho Bean). 
; AS) 
Polycotylédonois, W (Pine). 
(5.) PosITIoOn AND ARRANGEMENT OF EMBRYO: 
Eccentric, e embryo on one side of albumen (Indian 
Corn). 
Peripheric, curved around albumen (Four-o’clock). 
Accumbent, W- applied to the cotyledons when the radi- 
cle is bent and lies along their edge (Water-cress), 
Incumbent, {)): applied to the cotyledons when the radi- 
cle rests against the back of one of them (Shepherd’s 
Purse). 
Conduplicate, 28))e applied to cotyledons that are incum- 
bent and so folded as to embrace the radicle (Mustard). 
(6.) THE DIRECTION OF THE EMBRYO AS RESPECTS THE 
PERICARP. : 
Ascending, pointing to the apex. 
Descending, pointing to the base. 
Centripetal, pointing to the axis. 
Centrifugal, pointing to the sides, 
