143 
I 
! 
Limnanthacese agree in tlie number of the parts of the flower, the deeply-lobed | 
ovary, the single style, the number of the lobes of the fruit, and the texture of j 
the pericarp ; and Limnanthes has, moreover, exactly the taste of Tropaeolum 
majus. Under these circumstances I am almost doubtful whether the order 
ought not to enter the Geranial alliance ; but then its stamens placed at the I 
edge of a thin perigynous disk, and the little projection at the base of the fila- I 
ments, seem to point to a different type of structure. The disk led me ) 
formerly to consider one of the two genera (Florkea), of which the order con- ' 
sists, allied to Sanguisorbeae ; and I have no doubt, in fact, that it is one of the i 
transitions from the Gynobaseous to the Apocarpous group. i 
Geography. Natives of the temperate parts of North America. j; 
Properties. Limnanthes is pungent. I 
GENERA. I 
Limnanthes, R. Br. 
Florkea, W. 
Group VIL ^pocarpo^ae* 
Essential Character. — Carpels distinct either wholly, or at least by their upper ends 
and styles. Ovary without parietal placentae, or a gynobase. Calyx not in a broken whorl. 
No epigynous disk. 
No difficulty need occur in recognizing the orders of this group if the fore- 
going character be attentively considered. It joins the last group by Florkeales, 
Magnoliacese, in the albuminous group, by Calycanthacese, and Ranunculacese 
by Rosacese, and Burseraceae and Spondiacese, in Syncarposae, by Balsamales. 
Its principal anomalies consist in apetalous genera and species. 
Alliance I. ROSALES. ’I 
Essential Character. — Albumen wholly absent. ; 
Perhaps there is no positive character which can divide this from the other 
alliances, for even the want of albumen is liable to exception, as in Leguminosse. 
The alliance is, however, known practically as follows : — it never has two 
diverging carpels, as Saxales ; nor a succulent texture, as Crassales ; nor 
balsamic juice, as Balsamales. So that its characters are negative rather than ; 
positive. Sanguisorbese are a degenerate form of Rosaceae, connecting them 
with Incompletse. 
I 
Order CIX. ROSACE^^^. The Rose Tribe. I 
I { 
Rosacea, Juss. Gen. 334. in part (1789) ; DC. Prodr. 2. 525. in part (1825) ; DC. and '< 
Duty Botan.Gall. in part (1828) ; Lindl. Synops.p. 88. (1829). |1 
Essential Character. — Calyx 4- or 5-lobed, with a disk either lining the tube or 
surrounding the orifice; the fifth lobe next the axis. Petals 5, perigynous, equal. Stamens j 
indefinite, arising from the calyx, just within the petals, in aestivation curved inwards; j! 
anthers innate, 2- celled, bursting longitudinally. Ovaries superior, either solitary or several, ,!• 
1 -celled, sometimes cohering into a plurilocular pistil ; ovules 2, or more, suspended, very 
