688 SCROPHULARIACEAE 



smooth or finely lined transversely. [Named in honor of Franz Balthasar von Lindern, an 

 early botanist.] 



Species SO or more, mostly in the warmer parts of the Old World, the following widespread in North and 

 South America. Type species, Lindernia pyxidaria All. 



Seeds pale yellow, mostly 2 or 3 times as long as wide; lower leaf-blades obviously narrowed at base; pedicels 

 shorter than bracts. \. L. dubia. 



Seeds yellow or brownish yellow, mostly one and one-half to two times as long as wide; leaf -blades all widest 

 near base and rounded-clasping. 2. L. anagallidea. 



1. Lindernia dubia (L.) Pennell. Short-stalked Lindernia. Fig. 4518. 



Gratiola dubia L. Sp. PI. 17. 1753. 

 Capraria gratioloides L. Syst. Veg. ed. 10. 1117. 1759. 

 Ilysanthes riparia Raf. Ann. Nat. 13. 1820. 

 Ilysanthes gratioloides Benth. in A. DC. Prod. 10: 419. 1846. 

 Ilysanthes dubia Barnhart, Bull. Torrey Club 26: 376. 1899. 



Lindernia dubia Pennell, Monog. Acad. Phila. No. 1: 141. 1935. (The plant of the Pacific States is the 

 shorter-pedicelled L. dubia subsp. major (Pursh) Pennell, op. cit. 146.) 



Plant glabrous, 1-3 dm. tall, widely branched. Leaf-blades 1-3 cm. long, narrowly elliptic 

 to elliptic-lanceolate or ovate, the lower narrowed but the upper rounded or clasping at base; 

 pedicels 5-12 mm. long; corolla 9-10 mm. long, those of the later flowers mostly falling un- 

 opened; capsule 4 mm. long. 



Stream margins, Upper Sonoran and Transition Zones; Washington to northern California, also widespread 

 over eastern North America, and occurring far southward to southern South America. Type locality: Virginia. 

 July-Sept. 



2. Lindernia anagallidea (Michx.) Pennell. Long-stalked Lindernia. Fig. 4519. 



Gratiola anagallidea Michx. Fl. Bor. Amer. 1 : 6. 1803. 



Lindernia anagallidea Pennell, Mon. Acad. Phila. No. 1: 152. 1935. 



Plant glabrous, usually 0.5-2 dm. tall, widely branched. Leaf-blades 0.5-1.2 cm. long, ovate, 

 rounded ov clasping at base (or lowermost slightly narrowed) ; pedicels 10-25 mm. long, lower- 

 most sometimes shorter ; corolla 7-9 mm. long, apparently all opening ; capsule 4-5 mm. long. 



Sandy margins of streams and ponds. Lower Sonoran Zone to Transition Zone; Washington to middle 

 California, also widespread over eastern North America, and occurring far southward to southern South Amer- 

 ica. Type locality: South Carolina. July-Sept. 



2. MAzUS Lour. Fl. Cochinch. 385. 1790. 



Diffuse annual or biennial herbs, with opposite leaves, those subtending the flowers 

 scattered, minute, and linear-subulate. Bracteoles none. Sepals 5, united about one-half 

 their length. Corolla blue-violet, 2-lipped, the upper lip with short acutish lobes, the lower 

 much longer, spreading, ventrally with 2 finely pubescent pale ridges (with yellow cross 

 areas). Filaments 4, didynamous, all antheriferous. Stigmas distinct, lamelliform. Cap- 

 sule loculicidal, dehiscing even through septum. Seeds minutely reticulate. [Named from 

 the Greek, referring to the teats or tubercles in the mouth of the corolla.] 



About 20 species, mostly of southeastern Asia. Type species, Masus rugosus Lour. 



1. Mazus japonicus (Thunb.) Kuntze. Japanese Mazus. Fig. 4520. 



Lindernia japonica Thunb. Fl. Jap. 253. 1784. 

 Mazus japonicus Kuntze, Rev. Gen. PI. 1 : 462. 1891. 



Plant loosely pubescent, 0.5-1.5 dm. tall. Leaves mostly near base, the blades usually 1-3 

 cm. long, cuneate-obovate, sinuately dentate or denticulate ; pedicels 5-7 mm. long ; calyx 5-8 

 mm. long, its lobes lance-ovate; corolla 7-10 mm. long; capsule 3-4 mm. long. 



Lawns and grassy waysides, Portland, Oregon. Native of eastern Asia. May-Nov. 



3. MIMULUS L. Sp. PI. 634. 1753. 



Erect or diffuse annual or perennial herbs, or in section Diplacus shrubs, with oppo- 

 site entire to dentate or rarely laciniate leaves, and flowers axillary to foliose bracts of a 

 simple and sometimes spike-like raceme. Bracteoles none. Sepals 5, united nearly through- 

 out (less so in section Mimuloides), tube usually inflated and plicate-angled, the teeth equal 

 or the uppermost longest. Corolla 2-lipped, yellow, purple, red, or violet, the throat open 

 or its orifice closed by a palate. Filaments 4, didynamous, all antheriferous. Stigmas 

 distinct and lamelliform, or else adhering by the margins into a funnelform structure. 

 Capsule cylindric, loculicidal, the septum unruptured to deeply splitting in dehiscence. 

 Seeds wingless, yellowish, reticulate to nearly smooth. [Name Latin, diminutive of mimus, 

 a mimic actor.] 



