RANUNCDLACEJE. 16 



3. THALICTRUM, Toumefort. 



1. T. polycarpuin, Watson. Akenes in dense heads, 2 or 3 lines long. 



2. T. occidentalis, Gray. Akenes 1 to 6, 3 or 4 lines long, narrower. 



3. T. sparsiflorum, Turcz. Anthers obtuse; fruit heads nodding. 



4. TRAXJTVETTERIA, Fischer & Meyer. 

 1. T. grandis, Nntt. Slender: leaves few, 5-7-lobed, laciniate-toothed. 



5. MYOSTJRXJS, Linnaeus. 



1. M. minimus, Linn. Receptacle in fruit 1 or 2 inches long. 



2. M. aristatus, Benth. Receptacle shorter, akenes beaked. 



3. M. sessilis, Watson. Flowers sessile: fruit heads 2 to 6 lines long. 



6, RANUNCTJIiUS, Linn. 



* Aquatic: leaves round -reni form and lohed or, when submersed, JUiforrri'dissected. 



Petals white: akenes wrinkled crosswise 1, 3 



Petals yellow: akenes not wrinkled 6 



* * Not aquatic i leaves all radical : scapes naked or 1-2 bracteaie, mostly 1-Jlowered: 



sepals petaloid. 



Sepals white: petals minute: leaves cordate or reniforra 3 



Sepals pinkish, persistent jietals pink: leaves compound 4 



* * * Usually growing in wet places. 



Leaves all entire, oval or narrower 7, 8, 9, 10 



Leaves rather fleshy, simple or 3-foliolate; lobes rounded 5, 12 



* * * * Not aquatic but some species growing in wet places: leaves variously divided 



or lohed. 



Alpine, tufted: leaves round-reniform to cuneate, small 11 



Some or all the leaves temately compound: stems branching. 



Petals usually more than 6 15 



Petals usuaUy 5 13, 16, 17, 18, 19 



1. R. aquatilis, Linn. var. heterophyllus. Sepals deciduous: receptacfe hairy. 



2. R. Liobbiij Hiern. Sepals persistent enclosing the few akenes. 



3. R. hystriciilu-s Gray. Akenes 2 or 3 lines long, tapering ; beak hooked. 



4. R. Andersoni, Gr. Akenes bladdery, 4 or 5 lines long. 



5. R. Cymbalaria, Pursh. Akenes enlarging upward; beak oblique. 



6. R. mviltifidus, Pursh. Petals 5 to 8 with a large scale; beak straight, 



7. R. pusillus, var. liindheimeri, Gr. Akenes granulate. 



8. R. Flammula, Linn. var. reptans, Gr. Akenes subglobose. 



