In mud and sand-gravel along streams and on shores, in wet seepage areas and 

 in stream beds, in Okla. (McCurtain, Stephens and Johnston cos.) and mostly in 

 cen. and e. Tex., June-Oct.; from Ont. to la. and Kan., s. to Ga., Ala., La. and 

 Tex. 



7. Limnophila R. Br. 



About 30 species that are native mainly in Africa and Australia. 

 1. Limnophila sessiliflora Bl. Fig. 692. 



Aquatic glabrous herbs with mostly branched leafy stems that are to 5 dm. 

 long or more; leaves 3 to 6 in a whorl, all pinnatisect or the uppermost opposite, 

 linear-spatulate and toothed, gland-dotted, usually 2-2.5 cm. long; flowers axillary, 

 solitary, sessile or very shortly pedicelled; calyx about 8 mm. long, with 5 ovate 

 acuminate lobes, the tube hemispheric in fruit; corolla about 12 mm. long, pink 

 or lavender-pink, bilabiate, the upper lip entire or bifid, the lower lip nearly 

 equally 3-lobed and spreading, the tube cylindric; capsule orbicular, swollen, about 

 5 mm. thick. 



Attached to bottom of lake and in current of river at San Marcos (Hays Co.), 

 Tex. where it has been introd. and has become well-established, July-Nov.; a nat. 

 of Asia. 



8. Mimulus L. Monkey-flower 



Herbs (in ours) with perennial rhizomes or stolons; flowers axillary; calyx 

 tubular, angled or prismatic, regular or irregular, the lobes shorter than the tube; 

 corolla irregular, bilabiate; lobes of upper corolla lip erect to reflexed; lobes of 

 lower corolla lip spreading or deflexed, arched in the throat or with 2 elevated 

 ridges partially or completely closing the orifice; stamens 4, didynamous, inserted 

 near middle of corolla tube, the anthers approximate in pairs with their sacs 

 divergent; style elongate, the stigmas 2 and platelike; capsule cylindric, loculicidal, 

 many-seeded. 



More than 100 species that are world-wide in distribution, mostly in western 

 United States. 



1. Calyx teeth equal or nearly so (2) 



1. Calyx teeth unequal, the posterior tooth larger than the others (8) 



2(1). Corolla lobes distinctly unequal (3) 



2. Corolla lobes equal or nearly so (6) 



3(2). Corolla throat nearly closed by the prominent palate (4) 



3. Corolla throat broad and more or less open (5) 



4(3). Leaves mostly sessile; pedicels more than one half as long as the leaves.... 

 1 . M. ringens. 



4. Leaves distinctly petioled; pedicels mostly less than one half as long as the 



leaves 2. M. alatus. 



5(3). Corolla scarlet or carmine; calyx teeth 4-6 mm. long 3. M. CardinaJis. 



5. Corolla yellow; calyx teeth less than 3 mm. long 4. M. floribundus. 



6(2). Annual; corolla yellow throughout or the lobes purple-red 



5. M. rubellus. 



6. Perennials (7) 



7(6). Flowers solitary, scapose; corolla yellow; plant small, rarely to 1 dm. tall 

 6. M. primuloides. 



7. Flowers several, racemose; corolla scarlet or carmine; plant rather stout 



7. M. Eastwoodiae. 



1473 



