228 American Midland Naturalist Monograph No. 2 



from Eur. May-Sept. Butter-and-Eggs L. vulgaris Mill. 



2. Corolla blue or white, 10-12 mm. long; calyx-lobes lanceolate; sandy soil. 



May-June _L. canadensis (L.) Dum.-Cours. 



1. Flowers axillary; plants glandular or pubescent; corolla 5-10 mm. long. 



3. Leaves linear-spatulate to linear; stem erect, glandular; calyx-lobes linear; 



roadsides and waste places, adv. from Eur. May-Aug. {^Chaenorrhiniim 



minus (L.) Lange} L. minor (L.) Desf. 



3. Leaves hastate; stem prostrate, pubescent; calyx-lobes lanceolate; waste 

 ground, nat. from Eur. Sangamon Co., G. D. Fuller & G. M. Link 



567. June-Sept. \^Kickxia elatine (L.) Dumort.} 



_L. elatine (L.) Mill. 



7. Lindernia All. 



{Il^santhes Raf.) 



L. dubia (L.) Pennell. Moist ground, often along streams, ditches, and 

 ponds, locally abundant throughout III. July-Sept. [/. anagallidea (Michx.) 

 Raf.; /. attenuata (Muhl.) Small; /. dubia (L.) Barnh.} 



8. Gratiola L. 



1. Corolla golden yellow, 10-15 mm. long; sterile filaments 2, slender; capsule 

 3 mm. long; seeds brown; leaves entire or remotely denticulate; plants 

 perennial, with rhizomes; wet ground, rare. Forest Park, Cook Co., Sey- 

 mour. [G. aurea Muhl.] G. lutca Raf. 



1. Corolla light yellow or white, 6-12 mm. long; sterile filaments minute or 

 none; capsules 3-7 mm. long; seeds yellow; leaves repand to serrate; an- 

 nuals with fibrous roots. 

 2. Pedicels slender, 1-2.5 cm. long in fruit, equalling or exceeding the leaves; 

 plants glandular-puberulent; capsules ovoid; wet ground and borders of 



ponds, not uncommon. May-Aug. [G. virginiana of auth., not L.l 



G. ncglecta Torr. 



2. Pedicels stouter, usually shorter than the leaves, less than 1 cm. long; 

 plants glabrous; capsules globose; shores and ditches, less common than 

 the preceding. May-June. [G. sphaerocarpa Ell.] G. virginiana L. 



9. MiMULUS L. — Monkey Flower 



1. Corolla violet; stem erect; leaves lanceolate to oval. 

 2. Leaves sessile, clasping; pedicels longer than the calyx; along streams, not 



uncommon. July-Sept M. ringens L. 



2. Leaves short-petioled; pedicels shorter than the calyx; wet ground, 



throughout 111., except the n. counties. July-Sept M. alatus Soland. 



1. Corolla yellow; stems slender, creeping; leaves suborbicular; wet ground in 

 the n. half of the state. June-Sept. [M. glabratus var. fremontii (Benth.) 

 Grant; M. jamesii T. & G.] M. gcyeri Torr. 



10. Bacopa Aubl. 



(Ihuhantlu'liiim HBK.; Macuillanua Raf.) 



B. rotundifolia (Michx.) Wettst. Water Hyssop. Margins of ponds, local. 

 July-Sept. [Bramta rotundifolia (Michx.) Britt.] 



