74 MISSOURI BOTANICAL GARDEN. 
xiv. p. 101; Véchting Ber. Deutsch. Bot. Gesellsch. 1885 
(Just, xiii. 1, p. 23 and 734), and Pringsheim’s Jahrb. wiss. 
Bot. xvii. p. 801, pl. 16; and Warming, Bygningen . . . af 
grénlandske Blomster, Copenhagen, 1886, p. 32. — Ex- 
cept for the notes by Beal and Gray, these all pertain to 
observations made in the old world. 
The development of the ovule, in some cases including 
the curious beak at what appears to be the apex, but is, in 
reality, the point at which the anatropous seed bends down- 
ward, on which the coma is inserted in many species, is 
more or less fully discussed by Baillon, Adansonia, xi. 
(Just, iv. p. 461); Hildebrand, Bot. Zeitung, 1872, 236- 
7, pl. 4, f. 6-8; and Warming, Ann. des Sci. nat., ser. 
6, v. p. 238. The seed-coats are treated by Barbey, l. c. 
pl. 21, and Marloth, Engler’s Bot. Jahrbiicher, iv. The 
mechanism of the dehiscence of the capsules is described 
by Beck, Sitzber. Zool.-Bot. Ges. Wien, xxxv. p. 23 (Just, 
xiv. 1, p. 832); Hichholz, Pringsheim’s Jahrb. fiir wiss. 
Bot. xvii. p. 573, pl. 35; and Leclerc du Sablon, Ann. Sci. 
nat., ser. 6, xviii. p. 66. The arrangements for dissem- 
ination are further considered by Hildebrand, Verbreitungs- 
mittel der Pflanzen, p. 68, 69, 105, 135, 142: and Uhick- 
ering, in Bot. Gazette, ix. p. 193, shows with what 
remarkable promptness the fire-weed, HZ’. spicatum, appears 
over large forest areas after they had been burned off. 
None of the species have any striking economic value. 
