242 THE FLORA. 



Analysis of the Genera. 



* Stemless. Leaves all radical, scape bearing an umbel a 



* Stems leafy. Flowers yellow, corolla wheel-form (tube none) b 



* Stems leafy. Flowers white, red, &o., never yellow, i-. .2 



2 Leaves whorled, at least those near the flowers. Corolla white . . . . c 



2 Leaves opposite, entire. Flowers axillary, solitary d 



2 Leaves alternate, entire. Flowers white e 



<t Cor. tube egg-shaped, lobes short, spread. Dwarf Primrose. Andhosa'ce. 



a. Corolla tube cylindrical, lobes spreading. , Primrose. Prim'dla., 1 



a Corolla tube cylindrical, lobes reflexed. American Cowslip. Dodecath'eon. 2 

 b Corolla 5- parted, without intermediate teeth. Loose-strife. Ltsqiach'ia. 8 



b Corolla 6-patted, with 6 intermediate teeth. Eaeemes axillary. Naumeer'gia. 



o Fls. 7-part. Lvs. entire, in a single whorl. Chick Wintergreen. Tbienta'lis. i 



c Fls. 6-parted. Leaves finely pinnatifld, in water. Featlier-foil. Hotto'kia. 

 d Plant prostrate, with scarlet corollas. Pimpernel. Anagal'lis. 5 



d Plant erect, with no corolla, but white calyxes. Mach Saltwort. Glaux. 



e Fls. 5-parted, panicled. Plant 8-15' high. Water Pimpernel, SAJt'oLus. 



c Fls. 4-parted, axillary. Plant 1-2' high. Dwa/rf Pimpernel. Centtju'cuhis. 



1. PEIM'ULA. Primrose. Auricula. 



Calyx angular, 5-cleft. Corolla salver-shaped, or often rather framel- 

 shaped, with 5 entire, or notched, or bifid lobes. Stamens 5, included. 

 Pod opening at the top, many-seeded. — y Herbs with the leaves all rad- 

 ical, and the flowers showy, in an umbel on a scape. 



* Corolla salver-form, limb abruptly spreading. Plants wild, rare 1, 2 



* Corolla salver-form, limb abruptly spreading. Plants cultivated 3, 4 



* Corolla funnel-form, limb gradually spreading. Cultivated a 



a Leaves hairy, rugose, toothed, or crenate, or wavy at edge 5, 6 ■ 



a Leaves smooth, plane, entire, or sometimes crenate....?, 8 



1 P. Mistassin'ioa. Mistassins P. Smooth, green, 8-8' high. Flowers 1-8, 



flesh-colored. On lake shores. N. First seen on L. Mistassins. 



2 P. farino'sa. Bird's-eye P. Mealy, 8-10' high. Flowers 8-20, lilac-yellow. 



Shores of the great lakes. N. 



3 P. grandiflo'ra. Cormnon P. Petals oboordate, notched, yellow, purple, &o. t 



4 P. purpu'rea. Purple P. Petals obtuse, entire, dark-violet, never yellow, t ' 



5 P. offlcina'Us. Cowslip P. Lvs. hairy. Outer fls. nodding, border concave, t 



6 P. ela'tior. OxUp P. Leaves smooth above. AH fls. nodding, border fiat, t 

 1 P. Anrio'nla. Aurieula. Lvs. and calyx mealy-glaucous. Bracts very short, t 

 ? P. calyci'na. Cup P. Lvs. white-edged, calyx inflated. Bracts long. Piirpl. f 



