PRIMULACEAE (PRIMROSE FAMILY) 643 



PLUMBAGINACEAE (Leadwort Family) 



Herbs, with regular h-merous flowers, a plaited calyx, the 5 stamenc opposite 

 the separate petals or the lobes of the corolla, and the free ovary l-cellcd, icith a 

 solitary ovule hanging from a long cord which rises from the base of the cell. — 

 Represented in our flora by the single genus 



1. LIM6NIUM [Tourn.] Hill. Sea Lavender. Marsh Rosemary 



Flowers scattered or loosely spiked and 1-sided on the branches, 2-3-bracted. 

 Calyx funnel-form, dry and membranaceous, persistent. Corolla of 5 nearly or 

 quite distinct petals, with long claws, the 5 stamens severally attached to tlioir 

 bases. Styles 5, rarely 3, separate. Fruit membranous and indehisccnt, in the 

 bottom of the calyx. Embryo straight, in mealy albumen. — Sea-side perennials, 

 with thick and stalked radical leaves ; the naked flowering stems or scapes 

 branched into panicles. (Aeifxwviov, the ancient Greek name, presumably from 

 "Keifiibv, a meadow.) Statice Willd,, not L. 



1. L. carolinianum (Walt.) Britton. Root thick and woody, very astringent ; 

 leaves oblong, spatulate, or obovate-lanceolate, 1-ribbed, tipped with a deciduous 

 bristly point, petioled ; scape much-branched, panicled, 1.5-6 dm. high ; spike- 

 lets 1-3-flowered ; flowers lavender-color ; calyx-tube hairy on the angles, tha 

 lobes acute or acuminate, with as many teeth in the sinuses. (Statice Limonium, 

 var. Gray.) — Salt marshes, Lab. to Tex. July-Sept. 



PRIMULAcEAE (Primrose Family) 



Herbs, with simple leaves, and regular perfect flowers, the stamens as mam) 

 as the lobes of the gamopetalous {rarely polypetalous) corolla {none in Glaux) 

 and inserted opposite them (on the tube or base), and a 1-celled ovary icith a 

 central free placenta rising from the base, bearing several or many seeds. 

 Calyx free from the ovary, or in Samolus partly adherent. Stamens 4 or o, 

 rarely 6 or 8. Style and stigma one. Seeds with a small embryo in fleshy 

 albumen. Ovules amphitropous, except in Hottonia. 



* Corolla or petaloid calyx with erect or si)reading segments. 

 ■»- Stemless ; leaves all in a cluster from the root ; capsule dehiscent by valves or teeth. 



1. Primula. Corolla funnel-form or salver-shaped, open at the throat. Stamens included. 



2. Androsace. Corolla short, very small, constricted at the throat. Stamens included. 



-J- +- Stems leafy. 



■H- Aquatic ; immersed leaves pectinate. 



8. Hottonia. Corolla short-salver-form. Flowers verticillate and racemose. 



++ ++ Terrestrial or marsh plants ; leaves entire. 



= Ovary adnate at base to the base of the calyx. 



4. Samolus. Corolla bell-shaped, with 5 staminodia in the sinuses. Flowers racemose. 



= .= Ovary wholly free. 

 a. Capsule dehiscent vertically by valves or irregularly, mostly globose. 



5. Lysimachia. Corolla 5-6-parted or 5-6-petaled. Staminodia none. Leaves dotted. 



6. Steironema. Corolla and calyx 5-parted. Five slender staminodia between the fertli> 



stamens. 

 T. TrientaliS. Corolla and calyx mostly 7-parted. Stem leafV only at the summit. 



8. Glaux. Corolla none ; the calyx petal-like. Flowers axillary. 



h. Globose capsule circumscissile, the top falling off as a lid ; flowers axillary. 



9. Anagallis. Corolla longer than the calyx, .^-parted. Leaves opposite. 



10. Centunculus. Corolla shorter than tho calyx. 4-5-cleft. Leaves alternate. 



* * Corolla and calyx with reflexed seements. 



11. Oodecatheon. Corolla 5-parted. Stamens exserted, conniveut in a cone. 



