THE TEGMEN 



131 



The Caruncle.- Tlu> ('iil;ir<;eiiu'iit at the iiiicr()])yle (tlic Canmcle, 

 Fig. 380, a) calls for the same scrutiny as the str()i)hiole. It may be 

 variously api)eM(la<j;ed (Fig. 382), and, like the latter, it may extend 

 into a partial or com})letc covering, the arillode. The arillus, or arillode 

 (Fig. 381), may he i)artial, as in nutmeg, or complete, as in the seed of 

 the Euonymus. 



Appendages. — Appendages to the seed do not always take the form 

 of an aril of either class, nor is their origin confined to the points from 

 which the aril devel()i)s. Fither as aril or ai)i)endage from the general 

 surface, they exliibit a great variety of form, of equal importance with 



,.« 





383. 



'''' iy?,si ^^ 



J94. '^os. jm. 



-Wl 



JUO. 



JM 



Fig. 383. Seed of Eiicharidiiim, with fringed margin. 384. Penicillate seed of Epilobium. 385. 

 Tufted seed of Pelrocoptis. 386. Finibriate-winged seed of Daitais. 387. Winged seed of Cinchona. 

 388. Pluniose-awned seed of Stroiihanthus. 389. A globose seed. 390. Lenticular seed of Lens. 

 391. Saucer-shaped seed of Lecanosperma. 392. Linear seed of Nepenthes. 393. A polyhedral seed 

 of Nolina. 394. Serrated seed of Akebia. 395. Reniforni seed of bean. 39G. Cochlear seed of Ilelio- 

 chnris. 397. Crescent-shaped seed of Menispermum. 398. A lobed seed. 399. Nutmeg, with the 

 albumin niniinutcd. 



those which characterize the pericarp. Forms of especially frequent 

 occurrence are exhibited by Figs. 383 to 388. Important distinctions 

 sometimes exist between seeds bearing similar ai)])endages, as regards 

 the j)oints from which the latter originate, as in the case of strojihanthus, 

 false and true. 



The general form of the testa is, of course, that of the seed, and calls 

 for terms applicable to the forms of solid bodies (Figs. 389 to 398). 



The Tegmen. — The tegmen, when present, is extremely thin and tightly 

 adiierent to the nucellus, following closely all inequalities upon the 

 surface of the latter, and occasionally having its intruded folds caught 

 between the forming masses of the albumin and discernible upon 



