STUDY 5. 
FLOWERS AND SOME MODIFICATIONS. 
A. Type Flower. 
1. The flower stalk (peduncle or pedicel) is usually 
more or less enlarged at its distal end, forming a 
receptacle upon which the floral parts are borne. 
2. The lower or outer parts are sepals which together 
constitute the calyx. The next structures are the 
petals which together constitute the corolla. What 
is the number, form, and color of the sepals and 
petals? What is their relation to each other? 
Draw one of each. 
3. The remaining parts are “essential,” and consist of 
an outer series, the stamens, and in the center one 
or more pistils. 
A stamen (sporophyl) consists of a slender stalk, the 
filament, and a distal enlargement, the anther; the 
anther bears one or more sporangia containing 
pollen (microspores). A pistil consists of one or 
more sporophyls (carpels) ; the basal enlargement 
of the pistil is the ovulary (ovary?), and ter- 
minates in one or more distal sticky portions, the 
stigmas, the slender portion which connects a 
stigma with the ovulary, if present, is the style. 
What is the number, form, and arrangement of both 
stamens and pistils? Make drawings and designate 
all parts. 
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