SCROPHULARINILE 319 



First pair ovate, obtuse, subcordate at the base, crenate-serrate. 

 This is the most common type, but seedlings occur frequently with 

 the first pair of leaves deeply trilobed; lateral lobes unequally 

 oblong or unequally obovate with a few teeth on the posterior side ; 

 terminal lobe oblong-cuneate or rhomboid-cuneate, crenate or 

 obtusely dentate. 



Second pair ovate, obtuse, shallowly cordate at the base, obtusely 

 serrate. This is the usual type, but more rarely the second pair 

 become lobed like the first. 



Third and fourth pairs oblong-ovate, obtuse, rounded or sub- 

 cuneate at the base, coarsely, obtusely, and irregularly serrate. 

 Karely the third pair are lobed and a detached portion may some- 

 times be seen on the petiole. 



Collinsia parviflora, Dougl. 



Hypocotyl very similar to last species. 



Cotyledons very similar to those of C. bicolor, almost orbicular, 

 emarginate, obtuse, dark green, reddish below, very indistinctly one- 

 nerved. 



Stem with primary internodes very slightly developed. 



First leaves showing a tendency to become trilobed, slightly 

 emarginate, ovate, obtuse, petiolate, minutely pubescent, dark green 

 stained with purple beneath, indistinctly pinnatinerved. 



Collinsia multicolor, Paxt. 



Hypocotyl as in C. bicolor, but 3-5 cm. 

 long, and light green or colourless. 



Cotyledons fleshy, ovate or almost ro- 

 tund, emarginate, sometimes almost cordate 

 at the base, glabrous except on the petioles, 

 dark green, pinnatinerved like the leaves, 

 with prominent venation. 



Stem. 1st internode 4-5 mm. long. 



First leaves ovate-oblong, emarginate, 

 crenate, petiolate, pubescent, light green, 

 pinnatinerved. 



Mimulus luteus, L. (fig. 560). 



Primary root normal. 



Hypocotyl short, tapering insensibly FIG. 560. Mimulus luteus. 

 into the root, glabrous. 



Cotyledons triangular, obtuse, incipiently tridentate near the 

 apex with the middle tooth much the largest and longest, traversed 



