THE TEGMEN 



131 



The Caruncle. — The enlargement at the micropyle (the Caruncle, 

 Fig. 380, a) calls for the same scrutiny as the strophiole. It may be 

 variously appendaged (Fig. 382), and, like the latter, it may extend 

 into a partial or complete covering, the arillode. The arillus, or arillode 

 (Fig. 381), may be partial, 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 develops. Either as aril or appendage from the general 

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



J£>^. J9J. -396. 



JS£ 



Fig. 383. Seed of Eucharidium, with fringed margin. 384. Penicillate seed of Epilohium, 385. 

 Tufted seed of Pelrocoptis. 380. Fimbriate-winged seed of Danais. 387. Winged seed of Cinchona. 

 388. Plumose-awned seed of Strophanthus. 389. A globose seed. 390. Lenticular seed of Lens. 

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

 of Nolina. 394. Serrated seed of Akebia. 395. Reniform seed of bean. 39G. Cochlear seed of Heho- 

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

 albumin ruminated. 



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 appendages, as regards 

 the points from which the latter originate, as in the case of strophanthus, 

 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 sohd bodies (Figs. 389 to 398) . 



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

 adherent 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 



