KEY FOR JUNE TO NOVEMBER 



501 a Ovary inferior 502 



b Ovary superior 503 



502 a Flowers %-i in. long, solitary or clustered in the axils 



Trios teum. p 215 



b Flowers about ^4 in. long, in panicles. .. .Valeriana. p 216 



503 a Ovary deeply 4-lobed Labiatae. p 204 



b Ovary not deeply 4-lobed 504 



504 a Flowers % in. or less long 505 



b Flowers % in. or more long 514 



505 a Flowers solitary in the axils of the leaves 506 



b Flowers not solitary in the axils of the leaves 509 



506 a Calyx 4-toothed Melampyrum. p 212 



b Calyx 5-lobed or 5-parted 507 



507 a Leaves linear; flowers only slightly irregular, rose-purple 



Gerardia. p2i2 

 b Leaves lanceolate to ovate 508 



508 a Calyx subtended by 2 bractlets; flowers white or whitish 



Gratiola. p2ii 

 b Calyx not subtended by 2 bractlets ; flowers purplish 



Ilysanthes. p 211 



509 a Flowers in dense spikes 510 



b Flowers in racemes or panicles 512 



510 a Leaves pinnately lobed or divided Pedicularis. p 212 



b Leaves not completely as in a 511 



511 a Leaves with entire margins Dianthera. p 213 



b Leaves with toothed margins Phyrma. p 213 



512 a Flowers greenish-purple, in panicles; stamens 4-5 



Scrophularia. p 210 

 b Flowers in racemes ; stamens 2 513 



513 a Racemes densely flowered; stamens longer than the 



corolla Leptandra. p 21 1 



b Racemes loosely flowered ; stamens not longer than the 



corolla Veronica, p 211 



514 a Flowers woolly within, white or faintly pink.Ckelone. p 210 

 b Flowers not woolly within 515 



515 a Flowers in bracted spikes; leaves pinnately lobed or 



divided Pedicularis. p 212 



b Flowers not in bracted spikes; leaves entire or toothed 516 



516 a Corolla swollen on one side at the base. .Antirrhinum, p 210 

 b Corolla not swollen on one side as in a 517 



517 a Flowers solitary in the axils Mimulus. p 210 



b Flowers in racemes or panicles 518 



518 a Leaves linear Gerardia. p 212 



b Leaves not linear 519 



57 



