PRIMULACEAE (PRIMROSE FAMILY) 643 



PLUMBAGINACEAE (LEADWORT FAMILY) 



Herbs, with regular b-merous flowers, a plaited calyx, the 5 stamens opposite 

 the separate petals or the lobes of the corolla, and the free ovary \-celled, with 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 their 

 bases. Styles 5, rarely 3, separate. Fruit membranous and indehiscent, 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. (Aeipwvtov, the ancient Greek name, presumably from 

 \i/j.uv, 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, the 

 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 many 

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

 and inserted opposite them (on the tube or base), and a l-celled ovary with 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 5, 

 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 spreading 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. 



+- +- Stems leafy. 

 H- Aquatic ; immersed leaves pectinate. 



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



H- -H- 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 fertile 



stamens. 



7. Trientalis. Corolla and calyx mostly 7-parted. Stem leafy only at the summit. 



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



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



9. Anagallis. Corolla longer than the calyx, 5-parted. Leaves opposite. 



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



* * Corolla and calyx with reflexed segments. 



11. Dodecatheon. Corolla 5-parted. Stamens exserted, connivent in a cone. 



