LABORATORY MANUAL OF HORTICULTURE 



Obtuse basin. A basin in which the sides show a very gradual slope. 

 Regular basin. A basin in which the sides are smooth. 

 Ridged, ribbed, and furrowed. Terms expressing slightly different degrees of 

 the condition in which depressed lines extend up the sides of the basin. 



FIG. 39. A, narrow basin ; B, wide basin ; C, obtuse basin ; 

 D, abrupt basin 



Symmetrical basin. A basin that is nearly round, or uniform in shape. 

 Wavy basin. A basin in which the furrows are indistinct. 



CALYX 



The lower part of the flower is called the calyx. The outer green cover- 

 ings of the flower bud are called the calyx lobes. Calyx lobes remain visible 

 in the mature fruit of some apples, pears, and quinces. 



Closed calyx. A calyx whose lobes fold over each other in such a way 



that the center is completely obscured. 

 Connivent. A term applied to calyx lobes 



which are upright and have the tip 



inclined toward the axis. 

 Convergent. A term applied to calyx 



lobes which are flat and inclined to- 

 ward the axis. 

 Deciduous. A term applied to calyx lobes 



which fall away, like those of the Sand 



Pears and of some pure-Siberian-crab 



species. 

 Divergent or reflexed. Terms applied to 



calyx lobes which turn backward. 

 Open calyx. A calyx whose lobes flare 



out in such a way that the center is 



clearly exposed. 

 Partly open calyx. A calyx whose condition is intermediate between the 



open and the closed state. 

 Persistent calyx. A calyx whose lobes remain attached to the fruit, as in 



some apples, pears, and quinces. 



In examining different specimens of the same variety of a species we 

 often find great variation in the above features. 



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FIG. 40. A, basin ; B, calyx ; 

 C, axis ; -D, cavity ; E, stem 



