710 SCROPHULARIACEAE 



49. Mimulus minor A. Nels. Smaller Mountain Monkey-flower. Fig. 4569. 



Mimulus minor A. Nels. Proc. Biol. Soc. Wash. 17: 178. 1904. 



Perennial herb, finely pubescent distally, rhizomatose and stoloniferous, the stems ascending 

 or diffuse, 1-3 dm. long. Leaf-blades elliptic-ovate or somewhat narrower, finely to saliently 

 dentate, palmately veined, 1-2 cm. long, truncately narrowed to short petioles ; pedicels becoming 

 20-50 mm. long, minutely pubescent with essentially glandless hairs ; calyx becoming 12-15 mm. 

 long, strongly plicate-angled, its lobes acute, the lower shorter, the lowest pair eventually up- 

 curved toward or against the uppermost one which is 3-4 mm. long; corolla 20-30 mm. long, 

 yellow, its throat ventrally with 2 densely hairy and finely red-brown-spotted ridges joined 

 distally into a palate that closes the orifice, lower lip with deflexed-spreading lobes, upper lip 

 shorter and with ascending lobes ; anthers glabrous ; stigmas fimbriate ; capsule stiped within 

 calyx, 7 mm. long, not dehiscing through septum-apex. 



Springs and stream banks, Hudsonian Zone; mountains of northeastern Oregon eastward to central Idaho 

 and southern Wyoming, south to Utah and northern New Mexico, Type locality; near Boulder, Colorado. 

 July-Aug. 



50. Mimulus caespitosus Greene. Tufted Monkey-flower. Fig. 4570. 



Mimulus scouleri var. caespitosus Greene, Pittonia 2: 22. 1889. 



Mimulus caespitosus Greene, Journ. Bot. Brit. & For. 33: 8. 1895. 



Mimulus Tilingii var. caespitosus Grant, Ann. Mo. Bot. Gard. 11: 154. 1925. 



Perennial herb, distally finely pubescent, the crowded stems decumbent, 0.3-1 dm. tall, with 

 creeping small-leaved runners. Leaf-blades narrowly elliptic to ovate, obtuse, denticulate to en- 

 tire, palmately 3-veined, 0.5-1.2 cm. long, cuneately narrowed to short petioles, the middle more 

 rounded, the upper sessile; pedicels becoming 30-60 mm. long; calyx becoming 11-15 mm. long, 

 strongly plicate-angled, its lobes acute, the lower shorter, the lowest pair eventually upcurved 

 toward the uppermost one which is 3-5 mm. long; corolla 20-30 mm. long, yellow, its throat 

 ventrally deeper yellow, with 2 hairy and brown-spotted ridges joined distally into a palate that 

 partially closes the orifice, lower lip with deflexed-spreading lobes, upper lip somewhat shorter 

 and with ascending lobes ; anthers glabrous ; stigmas fimbriolate ; capsule slightly stiped, 7 mm. 

 long, not dehiscing through septum-apex. 



Stream banks and wet rock crevices, Hudsonian Zone; Cascade and Olympic Mountains of Washington, 

 to the Selkirk Mountains of southern British Columbia. Type locality: Mount Rainier, Washington. July-Aug. 



51. Mimulus Tilingii Regel. Larger Mountain Monkey-flower. Fig. 4571. 



Mimulus Tilingii Regel, Gartenfl. 18: 321. pi. 631. 1869. 

 Mimulus implexus Greene, Journ. Bot. Brit. & For. 33: 8. 189S. 

 Mimulus lucens Greene, Leaflets Bot. Obs. 2: 7. 1909. 



Perennial herb, from slender rhizomes, glabrescent or nearly so, the stems decumbent, 0.5-3 

 dm. tall, slightly stoloniferous. Leaf-blades ovate to oval or wider, acutish to usually obtuse, 

 usually sinuately and saliently dentate, palmately veined, 1-3 cm. long, the lower rounded or 

 truncate-cuneate to short petioles, the upper sessile ; pedicels becoming 25-50 mm. long ; calyx 

 becoming 15-20 mm. long, strongly plicate-angled, its lobes acute, the lower shorter, the lower- 

 most pair eventually upcurved toward the uppermost lobe which is 3-5 mm. long ; corolla 25-35 

 mm. long, yellow, its throat ventrally deeper yellow, with 2 hairy and brown-spotted ridges 

 joined distally into a palate that nearly or quite closes the orifice, lower lip with deflexed- 

 spreading lobes, upper lip shorter and with ascending-erect lobes ; anthers glabrous ; stigmas 

 slightly fimbriolate; capsule slightly stiped, 7-8 mm. long, not dehiscing through septum-apex. 



Rocky or gravelly mountain streams, often among moss, Canadian and Hudsonian Zones; mountains of 

 Oregon and California, east to Montana and Colorado. Type locality: near Nevada City, California. July-Aug. 



Mimulus Tilingii var. corallinus (Greene) Grant, Ann. Mo. Bot. Gard. 11: 155. 1925. {Mimulus coral- 

 linus Greene, Erythea 4: 21. 1896; M. implicatus Greene, Leaflets Bot. Obs. 1: 189. 1906; M. minusculus 

 Greene, op. cit. 2: 5. 1909.) Foliage pubescent; pedicels 40-80 mm. long. Canadian and Hudsonian Zones; 

 Mount Shasta south to San Jacinto Mountains, California, and on Mount Rose in western Nevada. Type locality, 

 near Truckee, California. 



52. Mimulus microphyllus Benth, Small-leaved Monkey-flower. Fig. 4572. 



Mimulus microphyllus Benth. in A. DC. Prod. 10: 371. 1846. 



Mimulus guttatus var. microphyllus Pennell ex M. E. Peck, Man. PI. Oregon 654. 1941. 



Annual minutely pubescent to glabrous herb, the stems erect to decumbent or repent at base, 

 0.5-2.5 dm. tall, simple to widely and laxly branched. Leaf-blades orbicular-ovate, denticulate 

 to irregularly dentate, palmately veined, usually 0.5-1.5 cm. long (rarely to 3.5 cm. long), 

 truncate or cordate to petioles shorter than blades or the upper sessile; pedicels very slender, 

 10-22 mm. long, finely pubescent to glabrous ; calyx becoming 9-12 mm. long, strongly plicate- 

 angled, its lobes acute, the lower shorter, the lowest pair strongly upcurved toward the upper- 

 most lobe which is 2-3 mm. long; corolla 15-22 mm. long, yellow, its throat ventrally with 2 

 densely hairy and minutely brown-spotted ridges joined distally into a palate that nearly closes 

 the orifice, lower lip with deflexed-spreading lobes, upper lip shorter and with erect lobes ; 

 anthers glabrous ; stigmas fimbriate ; capsule stipitate, 6-7 mm. long, not dehiscing through 

 septum-apex. 



Springy places and wet cliffs. Transition Zones; Cascade Mountains and coastal forests from northern 

 Washington to northern California, east to central Idaho. Type locality: Tongue Point, in the present Wahkia- 

 kum County, Washington. May-Aug. 



