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Indiana University Studies 
GALL DIAGRAMS, SUBGENUS ACRASPIS 
X 6 
Fig. 325. C. nubila russa, showing wool-like hairs on epidermis, coi- 
lenchyma (and nutritive?) zones. 
Fig. 326. C. villosa expositor, showing stiff hairs on epidermis, col- 
lenchyma, (and nutritive?) zones. 
Fig. 327. C. gemmulo ■ gemmula agamic form prinoides, showing stiff 
spines on epidermis, thick collenchyma, (and nutritive?) zones. 
Fig. 328. C. pezomachoides erinacei agamic form erinacei, showing 
spiny form of gall. 
Fig. 329. C. hirta macrescens, showing faceted surface derived from 
swollen bases of spines on epidermis, and collenchyma (and nutri- 
tive?) zones. 
Fig. 330. C. villosa acraspiformis, showing stiff spines on epidermis, 
collenchyma (and nutritive?) zones. 
Fig. 331. C. pezomachoides erinacei agamic form erinacei , showing 
naked form of gall. 
Fig. 332. C. pezomachoides erinacei bisex. form bicolens, showing epi- 
dermis and undifferentiated parenchyma zones. 
Fig. 333. C. a/rida, showing epidermis, collenchyma, fibrous parenchyma 
(protective?), and nutritive zones. 
Fig. 334. C. mellea Carolina, showing epidermis, scant collenchyma, 
rather fibrous parenchyma (protective?), and nutritive zones. 
Fig. 335. C. gemmula, gemmula bisex. form gemmula, showing epi- 
dermis and undifferentiated parenchyma zones. 
Fig. 336. C. conica, showing epidermis, collenchyma, rather fibrous 
parenchyma (protective?) and nutritive zones. 
