62 MISSOURI BOTANICAL GARDEN. 
Plate 3, S. latifolia Willd. — 1, Plant reduced one-fourth; 2, portion of 
a branching scape, reduced to half size; 8, 4, achenia; 5, cross-section of 
achenium; 6, fruiting head, natural size; 7, stamens from the same 
flower. 
Plate 4, 8. latifolia, Willd., forms a and b.— 1, fertile scape, reduced 
to half size; 2, sterile scape, reduced to half size; 8, achenium, form a; 
4, achenium, form b, from Washington; 5, achenium, form 0, from §. 
California; 6, achenium of S. Sinensis Sims, ex herb. Hooker. 
Plate 5, S. latifolia form c.— 1, Plant, reduced to half size; 2, achenium; 
3, cross-section of achenium; 4, seed. 
Plate 6, 8. latifolia form d.—1, Plant, reduced to half size; 2, 
achenium; 38, seed. 
Plate 7, S. latifolia form e.—1, Plant, one-fourth natural size; 2, 
achenium; 3, cross-section of achenium. 
Plate 8, S. latifolia pubescens (Muhl.).— Form a: 1 , leaf, one-half size; 
2, achenium; 3, stamen; 4, fruiting head, natural size; details after 
Engelmann.— Form b: 5, plant, three-eighths natural size. — Form ¢: 6, 
scape, natural size; 7, immature achenium; 8, stamen. 
Plate 9, S. Engelmanniana. — 1, Plant, one-half size; 2, achenium; 3, 
cross section of achenium; 4, pistil; 5, stamen; 6, leaf, natural size. 
Plate 10, 8. longirostra (Micheli) .— Details after Engelmann. 1, plant, 
one-third size; 2, leaf, one-half size; 83, achenium; 4, cross section of 
achenium; 5, immature achenium from Drummond’s type collection; 6, 
young fruiting head, natural size; 7, pistil; 8, stamen; 9, and 10, cross 
sections of scape, below and above. Sketches, except no. 4, made from 
Canby’s specimens. 
Plate 11, S. longiloba Engelm.—1, Plant, one-third natural size; 2, 
winter-tuber, with young plant; 8, achenium; 4, cross section of 
achenium; 5, seed; 6, stamen. 
Plate 12, S. Greggii.—1, Plant, one-sixth natural size; 2, leaf, one- 
half natural size; 3, achenium; 4, stamen. 
Plate 13, 8S. subulata (L.) Buch.— 1, Plant, natural size; 2, achenium, 
lateral and 3, dorsal view; 4, stamen. 8. subulata gracillima (S. Wats.).— 
5, Plant, natural size; 6, inflorescence; 7, immature achenium; 8, stamen. 
Plate 14, S. subulata natans (Michx.)—1, Plant, one-half size; 2, 
achenium, lateral and 3, dorsal view; 4, stamen. 
Plate 15, S. demersa.— 1, Plant, one-half natural size; 2, achenium; 8, 
stamen; 4, leaf, one-half natural size. S. Jiliformis.— 5, Plant, one-half 
’ natural size; 6, pistil; 7, stamen; 8, bracts, « 5. 
Plate 16, S. lancifolia L.—1, Plant, one-sixth natural size; 2, achenium. 
S. lancifolia falcata (Pursh). —8, Part of scape, natural size; 4, ache- 
nium; 5, stamen. 
Plate 17, S. ambigua.—1, Plant, one-third size; 2, achenium; 3, sta- 
men; 4, bracts, natural size. 
Plate 18, S. rigida Pursh.—1, Plant, one-half size; 2, 3, leaves, one- 
half size; 4, achenium; 5, cross section of achenium; 6, stamen. 
Plate 19, S. graminea Michx.—1, Plant, one-half size; 2, leaf, natural 
size; 3, achenium, lateral and 4, dorsal view; 5, seed; 6, stamen. 
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