114 MISSOURI BOTANICAL GARDEN. 
Plate 19, #. coloratum, Muhl. — 1, Plant, reduced one- 
half; 2, capsule, x 2; 3, stigma, x 25; 4, seed, x 25. 
Plate 20, Z. Novo-Mexicanum, Hausskn. — 1, Plant, re- 
duced one-half; 2, stigma, x 25; 3, seed, x 25. 
Plate 21, H. adenocaulon, Hausskn. ~— 1, Medium-sized 
plant, reduced one-half; 2, rosuliferous base of same, nat- 
tural size; 3, stigma, x 25; 4, seed, x 25. 
Plate 22, H. adenocaulon, Hausskn. (?) —dwarf form 
which may possibly be the /#. ciliatum of Rafinesque. — 
Three plants, natural size; seed, x 25. 
Plate 23, H. adenocaulon, Hausskn., var. occidentale. — 1, 
Plant, reduced one-half; 2, stigma, x 25; 3, seed, x 25. 
Plate 24, H. exaltatum, Drew. —1, Portions of plant 
with rosuliferous base, reduced one-half; 2, base of another 
plant with fleshy-scaled autumnal shoot, reduced one-half ; 
3, stigma, x 25; 4, seed, x 25. 
Plate 25, #. adenocaulon, Hausskn., var. ( ?) perplex- 
ans.— 1, Plant, reduced one-half; 2, two young autumnal 
rosettes, x 2; 3, seed, x 25. 
Plate 26, #. Californicum, Hausskn. — 1, Portion of 
plant, reduced one-half; 2, opening flower-bud, x 2; 3, 
seed, x 25. 
Plate 27, #. Parishii, Trel. —1, Young autumnal plant 
with rosettes, reduced one-half; 2, a rooted innovation, 
natural size; 3, stigma, x 25; 4, seed, x 25. 
Plate 28, H. delicatum, n. sp.—1, Plant, reduced one- 
half; 2, young seed, x 25. — 3, Var. denue, reduced one- 
half; 4, two turions of same, natural size; 5, stigma of 
same, x 25. 
Plate 29, #. glandulosum, Lehm. — 1-2, Flowering and 
fruiting summits of plants, reduced one-half; 3, stigma, 
x 25; 4, seed, x 25. 
Plate 30, £. brevistylum, Barbey.—1, Plant, reduced 
one-half; 2, base of stem at end of season, showing old and 
newly-formed turions, natural size; 3, flowering and fruit- 
ing summit of plant, natural size, — one flower showing a 
al et cll 
