
SNAPDRAGON FAMILY—MINT FAMILY 37 
and bloom in early summer. - The plants are rather small, being usually 
but 4-15 in. high. They occur on hills and mountains at 7000-10000 
ft. 
BLUE BEARD-TONGUE  PENTSTEMON UNILATERALIS 
Plate 23, fig. 6 
The blue-purple flowers of the Blue Beard-tongue are large and 
grow in conspicuous one-sided spikes on stems 2-5 ft. tall. They 
bloom in midsummer and are found in the mountains at 5500-8000 ft. 
MINT FAMILY 
SKULL CAP  SCUTELLARIA RESINOSA 
Plate 24, fig. 1 
The blue flowers of the Skull Cap grow in pairs on leafy stems 
4-15 in. high. They bloom in early summer and in fruit the reddish- 
brown calyx resembles a jockey’s cap rather more than a skull cap. 
The plants occur on plains, foothills and gravel slides at 5000-10000 
ft. : 
HEAL-ALL PRUNELLA VULGARIS 
Plate 24, fig. 2 
The flowers of the Heal-all are purple or white and bloom from 
early spring throughout the summer and fall. The stems are decum- 
bent-ascending, 4-12 in. high, and are widely distributed in woods, 
along roadsides and in wet places at 4000-9000 ft. The Heal-all has 
a bitter and astringent taste and is somewhat used in medicine. 
Brook Mint MENTHA CANADENSIS 
Plate 24, fig. 3 
The tiny pink or lavender flowers of the Brook Mint are clustered 
in the axils of the paired leaves, and bloom throughout the summer. 
