140 MISSOURI BOTANICAL GARDEN. 
Plate 12, H. Floridana. Staminate and pistillate plants.— 1, Portion 
of involucre; 2, group of stamens and bract; 8, lobe and bract; 4, rudi- 
mentary staminate and pistillate flowers; 5, young pistillate flower; 6, 
cocci; 7, 8, seeds. 
Plate 13, EZ. inundata. Staminate and pistillate plants. — 1, 2, Involu- 
cres and glands; 3, staminate flowers and bract; 4, lobe, X 5, margin 
of lobe and bract, much enlarged; 5, portion of capsule; 6, seeds. 
Plate 14, H. telephoides. — 1, Portion of involucre and glands; 2, invo- 
lucre with young capsule. 
Plate 15, H#. Darlingtonii.—1, Hairs from leaf, much enlarged; 2, 
involucre, lobe, and gland; 3, staminate flower and bracts; 4, 5, seeds. 
Plate 16, E. platyphylla. —1, Involucre and gland; 2, lobe and bract, 
much enlarged; 3, staminate flower and bract; 4, old involucre with 
capsule; 5, capsule; 6, seeds. 
Plate 17, FE. obtusata.— 1, Involucre, staminate flower and bract; 2, 
lobes and sinus, much enlarged; 8, involucre; 4, capsule and styles; 5, 
seeds. 
Plate 18, H. Arkansana.—1, Leaves; 2, involucre; 8, 4, lobes and 
bracts, much enlarged; 5, involucre and capsules; 6, capsule, staminate 
pedicel, and bract; 7, seed. Var. Missouriensis.— 8, Upper part of plant; 
9, leaves and seed. 
Plate 19, H. Arkansana.— 1, Southern Texas form (Heller, 1475) ; 2-6, 
var. Coloradensis.—2, plant; 3, 4, leaves and capsule from Watson, 
Antelope Island, Utah; 5, 6, leaf and capsule from Vasey, Colorado, 
1868. 
Plate 20, H. Arkansana atrosemina. — 1, Floral leaf; 2, lobes, sinus, 
and gland, much enlarged; 3, bract, much enlarged, and capsule; 4, 
seeds. 
Plate 21, H. Mexicana.— 1, Leaves; 2, involucre; 8, bract, glands, and 
lobes, much enlarged; 4, capsules; 5, seeds. 
Plate 22, H. dictyosperma. — 1, Leaves; 2, involucres, staminate flower 
and bract; 8, bracts, much enlarged; 4, lobes and sinus, much enlarged; 
5, capsules; 6, seed. 
Plate 23, HL. dictyosperma. — 1, Robust form, old plant (Brewer, 1214) ; 
2, involucre, capsule, and seed of same; 3, bracts of same, much en- 
larged; 4, slender form (Hort. Cantab. 1856); 5, leaf and seed of same; 
6, lobe of same, much enlarged; 7, seed of Lower Californian plant. 
Plate 24, H. alta. — 1, Involucres; 2, involucre and staminate pedicel 
and bract; 3, capsule; 4, branched wart of capsule, and styles; 5, seeds. 
Plate 25, H. leiococca, —1, Leaves; 2, involucres, staminate pedicel 
and bract; 3, portion of involucre, much enlarged; 4, capsules; 5, 
seeds. 
Plate 26, H. Helioscopia. — 1, Leaf; 2, involucres, staminate pedicel 
and bract, and gland; 8, bract, much enlarged, and hair from same, still 
more enlarged; 4, capsule; 5, seeds. 
Plate 27, EZ. trichotoma. — 1, Leaf; 2, involucre, lobe, and staminate 
pedicel with bracts; 3, bracts, much enlarged; 4, capsule; 5, seeds. 
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