136 Rhodora [June 



interpreted the region, to the extent at least of diagnosing it "rich 

 woods:" Polystichum Braunii, Carex scabrata(fig.9), Habenaria macro- 

 pkylla and //. bracteata, Arisacma triphyUum, var. Steuardsonii 

 (Britton) G. T. Stevens, 1 the Canadian representative of the more 

 southern or Alleghenian A. triphyUum, Ranunculus rccurvatus, Amel- 

 anehier Bartramiana (Tausch) Roemer, 2 Viburnum alnifolium, etc. 

 When, toward 9 o'clock, the 5-Mile River party came in, they were 

 a tired, hungry and rain-soaked pair. They had been out since 

 early morning in the richest spot of the summer and their sneakers 

 and clothes plainly showed the result of a day of enthusiastic ex- 

 ploration of the knife-sharp pinnacles and unyielding talus and 

 crests of gypsum. They had repeatedly emptied their collecting 

 boxes and were loaded down with two rucksacks, a large bundle and 

 two boxes full of specimens and had been forced to quit on account 

 of darkness, — 385 specimens of 154 species from a limy district, 

 but not at all the plants of the acid coastal plain such as Bissell and 

 1 had got at Grand Lake or which abound in Yarmouth County: 

 Cystoptcris bulbifera (fig. G), Carcx cburnca, SphenopkoHs pollens, 

 Amelanchier canadensis* (fig. 8), Fragaria vesca, var. americana and 

 Erigenm hyssopifolius (fig. 7) from the cliffs and talus; Pirrctis 

 iwdulosa (Michx.) Nieuwl., 4 Athyrium acrostichoidcs (Miehx.) Milde, 4 

 Milium effusion, Fcstuca nutans, Aspcrclla hystrix (L.) Hurnb., 

 Carcx rosea, C. rctrosa and C. Dcuryana, Lilium canadensc (fig. 10), 



' A. triphyUum, var. Slewardsonii is often very distinct and in its extreme develop- 

 ment seems like a good species, but too often transitional forms occur and the plant 

 seems to be best treated as a geographic variety. Bicknell has treated it as "a state 

 or form" of A. pusillum (Peck) Nash (Bicknell, Bull. Torr. Bot OL xxxvi. 1) and 

 states that "the evidence appears unmistakable that the two plants are extreme 

 variations of a single specios." A. triphyUum, var. pusillum Peck is a coastal plain 

 extreme extending from Texas to Oklahoma and Florida, thence north to south- 

 eastern Massachusetts. Var. Steuardsonii, in its best development, occurs from 

 Prince Edward Island to Vermont and Pennsylvania and perhaps to the mountains 

 of Georgia. At least, the material in the Gray Herbarium referred by Dr. Gray 

 to A. quinata (Nutt.) Schott (Arum quinalum Nutt.), a reputed species described 

 from Georgia as distinguished from A. triphyUum by its "Leaves quinate, lanceo- 

 late, acuminate," shows leaves bright green below as in var. Steuardsonii and vary- 

 ing on the same plant from termite to quinate, and the slope of the recurved flange 

 at base of the hood exactly as in the northern var. Steuardsonii. In var. Steuard- 

 sonii of New England the leaves, although normally ternate (as are the majority 

 of leaves of "A. quinata"), are sometimes quinate or with the lateral leaflets deeply 

 parted. 



J See Wiegand, Rhodora, xiv. 158 (1012). 



1 As interpreted by Wiegand, Rhodoha, xiv. 150 (1912). 



< See Weatherby, Rhodora, xxi. 178 (1919). 



VSee Hubbard, Rhodora, xiv. 187 (1912). 



