442 NATURAL HISTORY OF PLANTS. 
which it would perhaps be better to associate it." The separation of 
Rutacee and Burseracee is quite artificial, and partly conventional. 
If the latter had not a resinous, balsamic sac, we could not distin- 
guish them. It is also added, that the stamens are often inserted 
upon the disk, that they are never accompanied by scaly appen- 
dages nor hairs; but these characters are far from being absolute 
among the Picramnie, which are not always bitter; this is why 
types like Irvingia, Spatheha, &e., may be equally well ascribed to 
either group. It is said, on the other side, that the Burseree differ 
from the Zoddaliee by their exalbuminous embryo, diplostemonous 
androceum, and leaves destitute of glandular punctures; and from 
Aurantiee by their style not articulate at the base, and their dru- 
paceous fruit. But Zeclea, nearly allied to Zoddalia (to which it has 
even been ascribed), has seeds without any trace of albumen. 
Balanites, Tariri, Picrodendron, axe also destitute of it; and in the 
genus Jrvingia there is a species with an albuminous seed, and 
another with seed without perisperm. Many Rutacee of the Quassia 
series have neither hairs nor scales to the stamens; and in the 
genus Limonia, of the Aurantiee series, we have plants with the 
style articulate at the base, and others (G/ycosmis) where it is not 
so. We know, moreover, that there are true Bwrsereæ with punc- 
tuate leaves. This latter character is found in certain M/elacee, also 
nearly allied to Rutacee,? and especially to the Awrantiee series ; but 
it is easy to distinguish practically, those Mchacee having mona- 
delphous filaments united into a long tube. No hesitation would be 
possible except for the Cedrelea, distinguished by their ovules, 
always numerous, succeeded by compressed seeds, and by their cap- 
sular fruit, septifragal or loculicidal, with valves separating from a 
central columella. 

The properties’ of the Rutacee differ according as they are bitter 
or glandular-punctuate. In the latter case, they are generally 
fragrant, stimulant, and sometimes even dangerous to some degree. 
This is decidedly the case in the Rues themselves, and principally 

1 Quillaja, belonging to Rosacee, has been differt præcipue tubo stamineo crasso foliisque 
ascribed to Rutacew, under the name of Æon- rarissime punctatis.” 
tenellea À. S. H. (voi. i. 460). 3 Expz., Lnchirid., 547, 606.—Guiz., Drog. 
2 Benruam & Hooker (Gen., 328) say of Simpl., ed. 6, iii. 541.—Linpu., Wl. Med., 207. 
Meliaceæ: “Ordo Rutaceis proxime affinis, —Duvucn., Rep, 221.—Rosexru., Syn, Pl. 
quibus per Æindersiam transitus facilis est; Diaphor., 755, 860, 884, 1157. 
