PRIMULACE^E. (PRIMROSE FAMILY.) 271 



8. DODECATHEON. Corolla reflexed, 5-parted Stamens exserted ; filaments un ted. 

 * * Steins leafy : corolla wheel-shaped (or in Glaux none). 



4. TRIENTALIS. Corolla mostly 7-parted. Stem leafy at the summit. 



5. LYS1MACIIIA. Corolla 5-parted, without intermediate teeth. Stems leafy. 



6. NAUMBURGIA. Corolla of 5 or 6 petals, with intermediate teeth. 



7. GLAUX. Corolla none : the calyx petal-like. 



TUIBE II. A]YAGA:LL,IDEJE. Pod free from the calyx, opening all round by a trans, 

 verse line, the top falling off like a lid. 



8. ANAGALLIS. Corolla longer than the calyx 5-parted. Leaves opposite. 



9. CENTUNC ULUS. Corolla shorter than the calyx, 4 - 6-cleft. Leaves alternate. 



TRIBE III. SASlOltEJE. Pod partly adherent to the calyx, opening by valves. 



10. SAMOLUS. Corolla bell-shaped and with 5 sterile filaments in the sinuses. 



TRIBE IV. HOTTONIE^E. Pod entirely free from the calyx, opening by valves. 

 Seeds fixed by the base, anatropous. 



11. HOTTONIA. Corolla salver-shaped. Immersed leaves pectinately dissected. 



1. PRIMUJLA, L. PRIMROSE. COWSLIP. 



Calyx tubular, angled, 5-cleft. Corolla salver-shaped, enlarging above the 

 insertion of the stamens ; the 5 lobes often notched or inversely heart-shaped. 

 Stamens 5, included. Pod many-seeded, splitting at the top into 5 valves or 10 

 teeth. Low perennial herbs, producing a tuft of veiny leaves at the root, and 

 simple scapes, bearing the flowers in an umbel. (Name a diminutive of primus, 

 from the flowering of the true Primrose in early spring.) 



1. P. fariiaosa, L. (BIRD'S-EYE PRIMROSE.) Leaves elliptical or 

 obovate-lanceolate, the lower surface and the 3 - 20-flowered involucre, SfC. covered 

 with a white mealiness : corolla pale lilac with a yellow eye. Shores of Lakes 

 St. Clair, Huron, and northward. June, July. Scape 3' - 10' high. (Eu.) 



2. P. UliStassinica, Michx. Leaves spatulate or wedge-oblong, thin 

 and veiny, not mealy ; involucre 1 8-flowercd ; lobes of the flesh-colored corolla 

 broadly and deeply obcordate. Shores of the Upper Lakes : also Crooked 

 Lake (SartwtU) and Annsville, Oneida County, New York (Knieskern and 

 Vasey], Willoughby Mountain, Vermont ( Wood, frc.), and northward. May. 

 A pretty species, 2' - 6 r high. (Eu.) 



P. VERIS and P. VULGXRIS are the COWSLIP and PRIMROSE of Europe, 

 from which various cultivated varieties are derived. 



2. AN BROS ACE, Tourn. AKDROSACE. 



Calyx 5-cleft ; the tube short. Corolla salver-shaped or funnel-form, the tube 

 shorter than the calyx, contracted at the throat ; the limb 5-parted. Stamens 

 and style included. Pod 5-valved. Small herbs, with clustered root-leaves 

 and very small solitary or umbclled flowers. (An old name, composed of 

 av $po $, of man, and tra/cos, a shield : unmeaning. ) 



1. A. OCCldeilttilis, Pursh. Smoothish; scapes diffuse (2' -4' high), 

 many-flowered; leaves and leaflets of the involucre oblong-ovate, entire, sessile j 

 calyx-lobes leafy, triangular-lanceolate, longer than the (white) corolla. CD 

 on the Mississippi, Illinois, and northwestward. 



