88 THE FLORA OF THE ALPS 
17, EUPHRASIA, L. 
Flowers small, in unilateral bracteate spikes; calyx 
4-toothed; corolla tubular, 2-lipped, upper lip concave ; 
stamens 4, concealed by the upper lip, anthers hairy ; 
capsule oblong; leaves opposite, lobed or incised. Small 
erect herbs, parasitic on roots. 
A. Flowers white, usually dotted or streaked with 
violet, or dotted with yellow; leaves ovate or ovate- 
lanceolate, deeply serrate. The species of this section 
pass into one another, and are very difficult to distin- 
guish :—E£. officinalis, L., Eyebright, the English species, 
common. £. Rostkoviana, Hayne (pratensis, Fr.); 
flowers larger, corolla streaked with violet, lower lip 
with a yellow spot; dry banks, common. &. hzrtella, 
Jord.; flowers smaller, corolla-tube enclosed in the 
calyx, leaves broad, stem rigid, plant densely hairy ; 
meadows; Western and Southern Switzerland. £. salzs- 
burgensis, Funke; flowers small, leaves with deeply cut 
lobes at the base, narrower, glabrous; alpine pastures, 
frequent. . versicolor, Kern.; flowers larger, tube of 
corolla projecting beyond the calyx-teeth, lower leaves 
cuneate; meadows, frequent. . alpina, Lam.; flowers 
large, corolla white, often tinged with violet, stem not 
more than 14-2 in., upper leaves broad with spreading 
teeth; pastures. &. stricta, Host.; stem 4-6 in., lobes 
of lower lip of corolla unequal, with a yellow spot; mea- 
dows. E£. pulchella, Kern. ; flowers large, lower lip white 
with yellow spots, upper blue-violet, leaves wedge-shaped, 
with a few teeth; Tirol. £. montana, Jacq.; closely 
resembling officinalis, but stem usually simple, leaves 
fewer, broader; damp mountain pastures. 
