280 PLUMBAGINACEAE. (LEADWORT FAMILY.) 
and membranaceous, persistent. Corolla of 5 nearly or quite dis¬ 
tinct petals, with long claws, the 5 stamens attached to their 
bases. Styles 5, separate. Fruit membranous and indehiscent, 
1-seeded, in the bottom of the calyx. Embryo straight in mealy 
albumen. — Sea-side perennials, with thick and stalked leaves. 
(Sraroc^, an ancient name given to this or a like astringent herb, 
on account of its astringency.) 
1. S* Umonfum, L. Leaves obovate-lanceolate or oblong, 
tipped with a bristly point, 1-ribbed; scape much branched, the flow¬ 
ers rather crowded along the upper side of the spreading or recurved 
branchlets. — Common in salt marshes on the coast. Aug. — Calyx 
pink, hairy along the angles; corolla pale blue. Root thick and 
woody, very astringent. 
Armeria vulgaris, the Thrift of the gardens, is a native of 
Northern Canada as well as of Europe, but not of the United States 
proper. 
Order 64. PRIMULACEiE. (Primrose Family.) 
Herbs usually low , with regular perfect flowers , the sta¬ 
mens as many as the lobes of the monopetalous (rarely poly- 
petalous ) corolla and inserted opposite them on the tube , 
and a \-celled ovary with a central free placenta Trising 
jrom the base , bearing several or many seeds. — Calyx free 
from the ovary, or in Samolus partly coherent. (Corolla 
none in Glaux.) Stamens 4-5, rarely 6-8. Style and 
stigma one. Pod 1-celled. Seeds with a small embryo in 
fleshy albumen, amphitropous and fixed by the middle, ex¬ 
cept in Tribe 4. 
Synopsis. 
Tribe 1. PRIMULE.dE. — Pod entirely free from the calyx, open 
ing by valves. 
* Stemless : leaves all in a cluster from the root. 
1. Primcla. Corolla funnel-form or salver-shaped. Stamens in 
eluded. 
2. Dodecatheon. Corolla reflexed, 5-parted. Stamens exserted, 
united. 
* * Stems leafy : corolla wheel-shaped (or none). 
3. Trientalis. Corolla 7-parted. Stem leafy at the summit. 
4. Lysimachia. Corolla 5-parted, without intermediate teeth. 
