(B. ) Rydb. and Rydb., (B. ), ?Bull. Torrey Bot. Club 51: 170. 1924.?, 1924.

(B. ) Rydb. and Rydb., ?Bull. Torrey Bot. Club 51: 171. 1924.?, 1924.

Rydb., Rydb., (B. ), and Rydb., ?Bull. Torrey Bot. Club 51: 169. 1924.?, 1924.