SUPPLEMENT. 
THE FAMILIES OF FLOWERING PLANTS. 
By CHARLES Louis POLLARD, 
CHAPTER XXX.—Order Gentianales, Continued. 
AMILY SALVADORACEAE. A group of small trees belonging to 
five or six species, all comprised in the genus Salvadora. They 
resemble the Oleaceae in most particulars, having opposite leaves, 
and small panicled flowers with a 4-cleft calyx and corolla, 4-parted sta- 
mens and a 1-celled ovary. They are natives of northern and central 
Africa and southwestern Asia. 
Salvadora Indica is supposed to be the plant referred to as mustard 
in the New Testament, and which, as St. Matthew says, “is the least of 
all seeds; but when it is grown it is the greatest among herbs, and be- 
cometh a tree, so that the birds of the air come and lodge in the branches 
thereof.” As the fruitis pungent and mustard-like, there seems be some 
ground for the belief. 
Family Loganiaceae. Logania Family. Contains about 30 genera 
and 400 species, widely distributed in warm and tropical regions. They 
are herbs, shrubs, vines, or occasionally trees, with opposite stipulate 
leaves, and regular 4-5-parted flowers, the ovary free from the calyx and 
2-celled. The stamens are borne on the throat of the corolla and are 
equal in number to itslobes. Fruita 2-valved capsule, or a berry. The 
plants of this family all possess bitter and poisonous properties. Strych- 
nine, one of the most deadly of vegetable alkaloid poisons, is derived 
from Strychnos Nux-vomica, an East Indian tree, while the poison known 
as wourali, used by natives of Guiana for poisoning their arrow tips, is 
obtained from S. toxifera. Strangely enough, the pulp surrounding the 
seeds in many species of Strychnos is edible, and it is only the seeds 
themselves that are so highly poisonous (Fig. 189). 
In our country the Loganiaceae are represented chiefly by the beau- 
tiful climbing shrub known as the southern yellow jessamine (Gelsemium 
sempervirens). The bright yellow flowers of this constitute one of the 
most prominent features in the spring landscape of our southern States. 
There are also a number of insignificant weeds belonging to the family. 
Family Gentianaceae. Gentian Family. Distinguished from the 
preceding by the entire absence of stipules to the leaves, and the single- 
