142 MISSOURI BOTANICAL GARDEN. 
Plate 49, H. robusta.—1, Involucre, staminate pedicel, bract, and 
gland; 2, capsule; 8, seed; 4, plant of var. interioris. 
Plate 50, 2. Cyparissias. —1, Leaves; 2, scales from base of stem; 3, 
flowering involucre, glands, and staminate flowers; 4, capsule; 5, seeds. 
Plate 51, Z. Hsula. — 1, Flowering involucre with floral leaves, and 
glands; 2, portion of involucre; 8, staminate flowers and bract; 4, young 
and old capsules; 5, seeds. 
Plate 52, #. lucida. —1, Tips of leaves; 2, involucre and bract; 3, in- 
volucres and floral leaves; 4, stamens and glands. 
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