338 WALDRON— THE PEANUT 



Thompson. Peanut Growing in the Cotton Belt, S. R. S. Doc. 45, U. S. D. A., 



Ext. S., 1917. 

 Duggar, Cauthen, Williamson, Sellers. Peanuts, Ala. Agri. Exp. Sta. Bull. 



193, 1917- 

 Spencer and Brown. Peanuts in Florida. Univ. of Fla. Bull. 6, 1916. 

 Wolf. Leaf Spot and Some Fruit Rots of Peanut. Ala. Agr. Exp. Sta., Bull. 



180, 1914. 

 Kilgore and Brown. Peanut Culture, U. Car. Dept. Agr., Vol. 30, Bull. 3, 1909. 

 Jones. The Peanut Plant, 1907. 



EXPLANATION OF PLATES 

 Plate LXXIX. 



Fig. 4. Root hairs (rosette type) as they appear on and at the base of side roots. 

 Fig. 5. A portion of the upper epidermis of a leaf showing numerous stomata and 



crystals in "epidermal vessels." 

 Fig. 6. A section through the outer layers of a peanut fruit which was about three- 

 fourths grown. 



a — A portion of the epidermis and subjacent layer of the ovary 



still adhering. 

 b — More or less branched fruit hairs developing from the former 



ovarian third layer, now exposed, 

 c — Hypodermal tissue. 

 Fig. 7. A section through the outer layers of the hypogeal part of a mature gyno- 

 phore showing: 

 a — Hairs formed from the epidermal layers. 

 b — ^Two layers of the periderm-like tissue (hypoderm). 

 Fig. 8. A longitudinal section through a young ovary just before the blossoming, 

 a— Base of style, 

 b — Pollen chamber. 



c — Enlarged and indurated cells which become the apex in Fig. 9. 

 d — Ovules in ovarian cavity, 

 e — Fibro-vascular bundles. 

 Fig. 9. A longitudinal section through a gynophore tip, the ovary of which is three 

 weeks older than that of Fig. 5, and drawn to the same scale. Note the 

 very slight difference in size, the style scar at a now pushed to one 

 side by the enlarged epidermal tip cells which are shown at c in Fig. 8. 



Plate LXXX. 



Fig. 10. Photo of a Spanish variety peanut plant showing flowers, flower buds and 

 gynophores clustered together at its base as is typical of the Jastigiata 

 subspecies. 



Fig. II. Photo of an inverted plant showing gynophores recurving in reaction to 

 gravity. 



Fig. 12. Photo of plant which was righted again, shown in Fig. 11. Note the change 

 of the gynophore tips again. 



Fig. 13. Photo of a plant which, after forming gynophores, was put into a moist cham- 

 ber. Note the profuse development of hairs resulting. 



