36 SPRING FLOWERS. 



28. Scrophulariaceous Plants. Scrophulariace^. 



(69) Serophularia — corolla small, nearly globular, with five un- 



equal lobes ; stamens four, often with rudiment of a fifth. 



29. Orobanchaceous Plants. Orobanchace^. 



(70) Lathrsea — calyx bell-shaped, with four broad short teeth : 



upper lip of the corolla helmet-shaped. 



30. Labiate Plants. LABiATiE. 



* Two upper stamens longer than the two lower. 



(71) Nepeta — calyx tubular, fifteen-ribbed ; upper lip of the long- 



tubed corolla straight, notched. 



** Two upper stamens shorter than or only equaling to the lower. 

 t Corolla distinctly two-lipped. 



(72) Lamium — calyx regularly five-lobed ; stamens longer than 



the corolla-tube. 



tt Corolla apparently one-lipped. 



(73) Ajuga — upper lip of corolla minute, tooth-like, entire or 



notched. 



31. Thymelaceous Plants. Thymelace^. 



(74) Daphne — perianth four-cleft, often coloured ; stamens eight. 



32. Ulmaceous Plants. Ulmacejs. 



(75) Ulnms — perianth bell-shaped, with four to six sliort lobes, 



and as many stamens. 



33. Aristolochiaceous Plants. Aristolochiace^. 



(76) Asarum — perianth bell-shaped, regular, three-cleft ; stamens 



twelve. 



