510 Evans: HEPATICAE OF PuERTO RIco 
7. Underleaf, x 300. 8. Bracts and connate bracteole, 67. 9. Stems with three 
young propagula in various stages of development, % 47. 10. Base of an established 
propagulum, 47. 11. Apex of one of the first leaves of a propagulum, >< 300. 12. 
Underleaf of propagulum with sucker-like disc, < 360. 13. Marginal cells of disc 
with rhizoids, < 360. Ten was drawn from a specimen collected by A. A. Heller near 
Mayaguez (no. 4567 /. 4.) ; the other figures were all drawn from specimens collected 
by the writer at Cayey (no. 70a /. .). 
PLATE 24 
Leptolejeunea elliptica (Lehm, & Lindenb.) Schiffn. 1. Part of plant with peri- 
anth, postical view, « 45. 2. Cells from middle of lobe, enclosing an ocellus, 400. 
3. Cells from base of lobe showing basal ocellus, 280. 4. Apex of lobule, X 280. 
5. Underleaf, 280. 6. Q branch, postical view, 65. 7. Bracts and connate 
bracteole, 65. The figures were all drawn from specimens collected by A. A. 
Heller near Mayaguez (no. 4567 /./.). + 
Leptolejeunea stenophylla (Lindenb. & Gottsche) Schiffn. 8, Stem with perianth, 
postical view, 45. 9. 3 inflorescence, postical view, < 45. 10. Cells from middle 
of lobe, enclosing an ocellus, < 400. 11. Cells from apex of lobe, 280. 12. Cells 
from antical margin of lobe, 280. 13. Apex of lobule, 280. 14. Underleaf,, 
X 280. 15. Bract and connate bracteole, 65. 16. Perianth, X45. The figures 
were all drawn from specimens collected by the writer at Cayey (no. 70b). 
PLATE 25 
Leptolejeunea hamulata (Gottsche) Schiffn. 1. Stem with Q inflorescence, Po 
tical view. 2. Part of stem, antical view. 3. Cells from middle of lobe. 4- Cells 
from antical margin of lobe. 5. Cells from apex of lobe, 6. Outer portion of lobule. 
7- Underleaf. 8. Bract and bracteole. 9. Bract from same involucre. 10. Micro- 
phyllous branch showing a propagulum almost ready to become separated and the 
empty sheath of several older propagula, postical view. 11. An established propa 
gulum, becoming microphyllous in upper part. All the figures are drawn from spect 
mens collected by the writer at Cayey. 
