492 . BOTANY. 
Tamarix germanica, Tamarisk (pl. 69, fig. 4); a, flowering branch; 8, 
flower; c, sexual apparatus ; d, staminal tube displayed; ¢, anther; 7, petal; 
g, pistil; A, the fruit in the calyx; 2, a single fruit; %, vertical section of 
ditto. 
Orver 201. TremanpRaces#, the Porewort Family. Sepals four or five, 
slightly coherent, deciduous with a valvate zstivation. Petals four or five, 
deciduous, with an involute estivation. Stamens hypogynous, distinct, 
eight to ten, two before each petal; anthers di- or tetra-thecal, with porous 
dehiscence. Ovary bilocular, with one to three pendulous ovules in each 
cell; style one; stigmas one or two. Fruit a two-celled, two-valved 
-eapsule, with loculicidal dehiscence. Seeds anatropal, pendulous, with a 
caruncula at the apex; embryo cylindrical, straight, in the axis of fleshy 
albumen. Heath-like shrubs, with hairs usually glandular, alternate, or 
verticillate exstipulate leaves, and solitary, axillary, one-flowered pedicels. 
They are natives of New Holland. Nothing is known regarding their 
properties. Lindley mentions three genera including sixteen species. Ex- 
amples: Tetratheca, Tremandra. 
Orver 202. Potyeatacesz, the Milkwort. Family. Sepals five, very 
irregular, distinct ; three exterior, of which one is superior and two inferior ; 
two interior, usually petaloid lateral; sestivation imbricated. Petals 
hypogynous, unequal, usually three, of which one is anterior, and larger 
than the rest, and two are alternate with the upper and lateral sepals; _ 
sometimes there are five petals, two of them very minute; the anterior 
petal, called the keel, is often crested. Stamens hypogynous, eight, mona- 
delphous or diadelphous; anthers clavate, usually one-celled, and having 
porous dehiscence. Ovary mostly bilocular; ovules solitary, rarely two ; 
style simple, curved; stigma simple. Fruit dehiscing in a loculicidal 
manner, or indehiscent. Seeds pendulous, anatropal, strophiolate at the 
hilum; albumen fleshy ; embryo straight. Shrubs or herbs with alternate 
or opposite exstipulate leaves. They are found in all quarters of the globe. 
Lindley mentions nineteen genera, including 495 species. Examples: 
-*Polygala, Securidaca, *Krameria, Xantophyllum. Of these genera Polygala 
with twenty-four species, and Krameria with four, are natives of North 
America. Some authors place Krameria and Xantophyllum in a separate 
sub-order (Krameriez). Plants of the order Polygalacee have some 
resemblance to Papilionaces, but may be distinguished by the odd petal 
being inferior and the sepal superior. Polygala senega, the Seneca snake 
-root, is a plant of various medicinal applications. 
OrverR 203. Drosrracea, the Sundew Family. Sepals five, persistent, 
equal, sometimes united at the base, imbricated in eestivation. Petals five, 
alternate with the sepals, nearly or quite hypogynous, marcescent. Stamens 
distinct, marcescent, usually as many as the petals and alternate with them, 
rarely two to three times as many; filaments capillary or flattened ; anthers 
extrorse or innate; cells distinct, or somewhat connivent above, opening 
longitudinally, or rarely by a terminal pore. Ovary composed of two to 
five united carpels, one-celled ; placentas parietal, or filling the base of the 
cell; styles two to five, usually distinct or united at the base merely, each 
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