28 Muhlenbergia, Volume 8 



Leaves not undulate 

 Bracts obtuse or acute 



Bracts lomm, or more in length: calyx 7 mm. lorig, tcttli trianguliir-sub- 



ulate, usually with bristle-like hairs at the sinuses 13. M. lanceolata 

 Bracts 6 mm. or less in length: calyx 6 mm. long, teeth triangular, with- 

 tmt bristle-like hairs 13a. M. lanceolnta microcephala 



Bracts abruptly acuminr.te: calyx teeth triangulf.r-subulate 

 Bracts villous pubescent: calyx teeth vi.Ious pjbescent, not hya ine tipped 



14. M. Pringlei 

 Bracts short pubescent or puberulent 



Calj-x teeth short pubescent, not hyaline tipped, these and bracts tinged 



with rose 15. M. Elmeri 



Calyx teeth villous, their margins and tips hyaline, these and bracts 

 with white or rarely rose tinged margins 16. M. exilis 



^ I. MONARDELLA MACRANTHA A. Gray, Proc. Am. Acad. 11: 

 100. 1876. 



Madi'oiiella macraiitha Greetie, Leaflets 1: 169. 1906. 



Stems slender, lig^iesceiit at base, branching frotn a slender 

 creeping rootstock, 2/ to 5 dm. high, pubescent or puberulent 

 with more or less recurved hairs; internodes 2 to 5 cm. long: 

 leaves ovate to elliptical, i to 2 cm. long, on petioles about half 

 their length, entire or rarely faintly serrate, nearly or quite 

 glabrous: bracts equaling or shorter than cah x, thin, more or 

 less membranaceous and colored, ciliate on margins with long 

 villous hairs: flowers 10 to 20 in head: cal\x usualh- o\-er 2 cm. 

 long, villous at base, glandular pubescent throughout, teeth 

 4 mm. long, subulate: corolla 3 to 4cm. long, slender funnel- 

 form, scarlet or tinged with yellow, minutely and sparsely pu- 

 bescent w'ithout: stamens exserted bevond corolla lobes; anthers 

 on rather stout filaments 1.25 mm. long between tips of diverg- 

 ing pollen-sacs. 



Thirty-one herbarium sheets of this species are before me, 

 and throughout all of them, except those referred to the variety 

 lo7igiloba, the funnelform corolla tube and exserted stamens hold 

 well as characters. The size of the aniher is also a well marked 

 distinguishing feature between this and the ;m«« group. In 

 pubescence there seems to be acomplete gradation from merely 

 puberulent stem and glabrous leaves to the denselv villous pu- 

 bescent varietv. 



