298 PHYLUM XIV. ANTHOPHYTA 
stigmas. The ripened pistil tightly encloses the seed, 
forming the “grain” or “ caryopsis.”’ 
542. Maize (Indian Corn) has a solid (not hollow) 
stem and its spikelets are diclinous, the staminate form- 
ing a branching inflorescence at the top of the stem, the 
pistillate being crowded upon the lateral ‘“ears,’”’ which 
terminate short lateral branches, whose numerous 
crowded leaf sheaths form the “husks.” The staminate 
spikelets are in pairs (one sessile, the other stalked), 
and each is two-flowered. The pistillate spikelets are 
also in pairs, but here there is only one flower in each. 
The styles (“silks”) are long, and bistigmatic. The 
corn ‘‘kernel” is the ripened ovary with its tightly 
fitting single seed. 
543. The Sedges (Family Cyperaceae) are a family 
of widely distributed, somewhat more primitive, grass- 
like plants that differ in vegetative structure from the 
Grasses in that the leaves are three-ranked, instead of 
two ranked, and the stems solid instead of hollow. The 
spikelets more often have the bracts spirally arranged, 
only a few genera having them two-ranked as in the 
grasses. The axillary flower consists of a tri- or a bicar- 
pellary pistil, six, or more often three, stamens, and a 
perianth of two ternate whorls of 
narrow segments, or bristles or want- 
ing. The ovary wall is not grown 
fast to the single seed. 
544, Amaryllis (Jridales). In the 
Amaryllis the flower is Lily-like with 
a well developed perianth of six equal 
petaloid segments (sepals three, petals 
three), six stamens, and a tricarpellary, long-styled pistil, 
whose ovary is overgrown by the receptacular cup which 
carries up the perianth and stamens, so that the ovary 
Fie. 171.—Amaryllis. 
