176 PRIMULACEAE (PRIMROSE FAMILY) 



A. Leaves opposite or whorled along elongated stems. 

 B. Leaves sessile; flowers white or red or yellow. 



C. Flowers yellow; stem erect, 3-6 dm. high; leaves 2.5-5 cm. long, lanceolate. 

 C. E. (Probably in honor of a Mr. Naumburg.) 



Naumburgia thyrsiflorus (TUFTED MONEYWORT) 



CC. Flowers white or red; stem decumbent or diffuse, 1-3 dm. high; leaves 

 0.6-2.5 cm. long, not lanceolate. 



D. Plants of salt marshes, perennial; stem terete, very little branched if at 

 all; flowers white or pink; petals none. W. (Gk. glaukos = sea-green, 

 hence glaucous; referring to the color of the plant.) 



Glaux maritima (BLACK SALTWORI) 



DD. Plants of cultivated ground, annual; stem 4-sided, much branched; flowers 

 scarlet; petals present. W. (Gk. anagelao = to laugh; it was supposed 

 to counteract melancholia.) Anagallis arvensis (POORMAN'S-WEATHER GLASS) 

 BB. Leaves petiolate; flowers yellow. STEIRONEMA (p. 177) 



AA. Leaves either alternate or else in a basal or terminal tuft or whorl. 

 E. Leaves in a basal rosette. 



F. Corolla rotate, 4-5-parted; stamens often united into a cone about the 

 pistil. DODECATHEON (p. 177) 



FF. Corolla salverform or funnelform, 5-lobed; stamens not united. 

 G. Corolla- tube equaling or exceeding the calyx; plant perennial. 

 H. Capsule many-seeded; stamens exserted. E. (Diminutive of L. 

 primus = first; because some blossom very early.) 



Primula cusickiana (PRIMROSE) 



HH. Capsule i-2-seeded; stamens included. DOUGLASIA (p. 176) 



GG. Corolla-tube shorter than calyx; plant annual. ANDROSACE (p. 177) 



EE. Leaves not all in a basal rosette, scattered along the stem or in a terminal 



whorl. 



I. Leaves or most of them 25 mm. or more long; flowers either not sessile or 

 not solitary in the axils. 



J. Flowers few, terminal, not in racemes; stem simple; ovary superior; leaves 

 tending to be in a terminal whorl; seeds few. TRIENTALIS (p. 177) 



JJ. Flowers many, in terminal panicled racemes; stem diffusely branched; 

 ovary inferior; leaves all scattered along the stem; seeds many. E. 

 (Said to be from Celtic san = a greeting, mos = a pig; it was considered a 

 cure for pig diseases.) Samolus floribundus (BROOKWEED) 



n. Leaves 4-6 mm. long; flowers sessile, solitary in the axils. C. E. Dimin- 

 utive of L. cento = a patch; probably referring to its manner of growth.) 



Centunculus minimus (CHAFFWEED) 



DOUGLASIA 



Depressed, tufted. Calyx campanulate, 5-lobed, persistent. Corolla 

 tube somewhat inflated above, its throat somewhat contracted and 5-arched 

 beneath the sinuses. (Honor of D. Douglas, a Scotch botanist and col- 

 lector in our region.) 



A. Leaves canescent with forked hairs, 8-12 mm. long. C. E. D. dentata 



AA. Leaves glabrous or nearly so, 4-6 mm. long. W. C. D. laevigata 



