
14 : DEVELOPMENT OF THE FLOWER 
Then the subsequent pollen mass is completely lined out, it 
is cellular, and enclosed in a cellular tegument. At this time 
nitric acid resolves it into masses of nucleary cells; then these 
enlarge, become separated, and then divided into 3 or 4: 
original tegument adheres, but not continuously to the outer 
ends of the outermost cells. 
Trewia.—F los Femineus solitarius ex axilla folii, basi 1- 
bracteatus. 
Calyx tubulosus, 4, 5, 6-dentatus, demum lateraliter fissus. 
Ovarium liberum, stylo robusto 3-4-partito, laciniis varie 
tortis, stigmatibus plumosis, faciem internam styli occupan- 
tibus; 3, 4-loculare: ovulo cuivis loculo unico, pendulo, 
foramine placenta fungoidea obtecto hilo propinquo. Teg- 
mentis binis. à : 
Arbor mediocris vel parva, ligno albo [molli] in partibus 
novellis pilis stellatis insignita, gemmis squamis tectis. 
Folia opposita vel subopposita, cordato-ovata. Vernatione 
conduplicaté involutiva ? 
Stipulebine cuique folio, lineari-setacez, decidue. 
In Peepuls there are two stipule of convolute disposition 
the same as that of leaves; is there a general relation between 
the venation of the two ?, one is ae with the other, so 
they are really alternate. y 
Entering into the nature of stipules, ete. I believe this is 
the only instance of a plant having opposite leaves, and the 
ordinary form of stipulæ, by which I mean two leafy appen- 
dages to each leaf. 
The tendency to intrapetiolar stipulæ among opposite 
leaved plants would appear to be great, from the circumstance 
of an Urticaceous plant with opposite and alternate leaves, in 
which the opposite have intrapetiolar, the alternate the 
ordinary form. 
And although this would appear a marked instance of 
the composition of intrapetiolar stipule, I am not disposed 
to consider it more than a special instance. Stipules of - 

