ON NAIAS GRAMINEA DEL., VAR. DELILEI MAGNUS. 331 
XX.—EXpPLANATION OF THE Ficurss 
Puate 249. 
Fig. 1. The — portion of a branch of N. graminea, from Reddish; nat. 
siz 
2. Two of the leaves from same, drawn — broader than the natural 
hg the sheaths and sheiacs flattened o 
fs Prats 250. 
3. cy ad portion of a branch of N. graminea from Lower Egypt. Copied 
m Delile’s drawing in his ‘ Ne de l’ Egypte,’ but reduced to fees 
thirds original size. 
4. Base of a leaf-fascicle, showing reer eerie fruits, &c.; slightly 
en beries From Delile’s ‘Flore de l’ Egypte 
5. Section of fruit; enlarged. From Delile’s ‘Blore de V’Egypte.’ 
oh ATE 251. 
6—8. Arrangement of the cells of the erence spe on the leaf of (6), 
St sige — (7), N. ean ; (8), N. m and N. arguta. From 
xander Braun’s sketches in ‘ soaenad. of Botany,’ 1864, vol ii., 
. ae 
9. Form of sheath at base of leaf of N. minor; from ‘ foes trees = 
Flora Salina of Cesati, Passerini, and Ili, tav, xxviii, fig. 1 
10—14. Form of sheath at ae ‘ot leaf of (10), N. flexilis ; uy, N. minor 
» N. minor, var. setacea i f 3), falciculata: and (14), N. 
graminea. All copied oon . A. Braun’s woodeuts in ‘Journal 
of Botany,” 1864, vol. ii., p 
15. Male flower of N. temifola z Br. Enlarged 1s. From Magnus’s 
Beitrage; plate iv., fig. 5 
16. Anther of N. major, ‘with the perianth reflexed; enlarged. Fro: 
Gahata Plant tarum ra ze Germanic cs, Th. fr, Lud. Nees ab seis. 
beck, Fase. vi 
17. Male flower of N. 11 aoa aia. Nees ab Esenbeck, . ¢., fig. 24. 
18. Transverse section of male flower of N. major. Nees ab Eocnbei, ae 
19. Pollen of N. major ; enlarged. Nees ab Esenbeck, J. c., fig. 8. : 
20. aa flower of N. en , ee the perianth drawn back; eakia 
tom ‘Iconograp arum naturalinm regni vegetabi 
Dr. Adalbert eicicieie. “et Da cEiecdd Be 
21. Vertical section of male flower of PY . major: ‘enlarged. Schnizlein, 
4. Gr, tg. 
22. Male ee of N. major, showing the Ce sa of the perianth from 
the anther ; enlarged. Schnizlein, l. c. fig. 
Vertical section of a ae flower of x chee From ‘ Compendio della 
Flora Italiana,’ [. 
24—25. Dehiscence of t the ia oat of N. , after the observations 
of Braun; enlarged. Nees ab E aah ot oe figs. 9 and 10. 
26. Grains of Se} of = dip 9 with fovilla a5 "enlarge ed fas From 
“Compend. FI. It.,’ 
Mis ae section i a inale ‘flower of N. minor All. ; enlarged. ‘ Compend. 
Sik 
= 
bo 
“ee 
28. Male onl of Ne major ; enlarged 4. ‘Compend. FI. It.,’ U, ¢., fig. la. 
Base of leaf of N. major with the sheath opened. Intravaginal scales 
at the base ee sheath one on each side; enlarged 3. ‘Compend. 
" 
FL. Tt.,’ 
30. Intravaginal py of 'N. major; enlarged 3. ‘Compend. Fi. It.,’ l.c., 
fig. 1 
Pirate 252. 
31. Transverse section of the middle of the Joel of N. graminea, Del. ; 
_ enlarged . Magnus, ‘ Beitrage,’ pl. vi., fig. 3. 
32. Transverse section of oe side of the leat. of N. seemiae,: ape from 
Celebes; enlarged °3°. Magnus, ‘ Beitrage,’ pl. vi., fig. 2. 
