296 Rhodora [December 



A. CANADENSIS Greene. Apparently frequent throughout. 



A. neodioica Greene. Common, 



**A. neodioica, var. grandis Fernald. Yarmouth Co.: damp 

 rocky barren north of Tusket (Vaughan) Lake. Digby Co.: dryish 

 gravelly l;;uik, Meteghan; dry open bank near Little River, east of 

 Tiddville. Hants Co.: spruce woods along Five-mile River. See 

 p. 98. 



** A. neodioica, var. chlorophylla, n. var., a forma typica recedit 



A. petaloidea throughout its range has the middle and upper cauline leaves 

 tipped by a firm subulatc-aristate appendage, only the very uppermost or 

 bracteal with the appendage flattened; and when well developed it is taller 

 and with full corymbs of 5-15 heads. 



Typical A. petaloidea, which occurs from Rimouski Co., Quebec, westward 

 and southward, has the basal leaves spatulate to spatulate-ohovate and 

 rounded at apex; the cauline leaves at regularly decreasing intervals up 

 to the inflorescence; and the branches of the corymb or the pedicels mostly 

 0.1-3 cm. long. Var. subcorymbosa, which occurs from eastern Newfound- 

 land, and Prince Edward Island to southeastern Maine and Nantucket, has 

 the basal leaves oblanceolate and acute or acutish; the flowering stem nearly 

 or quite without leaves for a distance of 0.7-1.7 dm. below the inflorescence 

 and the branches of the corymb or the pedicels elongate (the lower often 0.5- 

 1.7 dm. long). Professor Wiegand has called my attention to a characteris- 

 tic plant of west-central New York which has the basal leaves of var. x (th- 

 eory mbosa but the short flowering-stem and more approximate cauline leaves 

 of typical A. petaloidea. This plant is so characteristic of much of New York 

 state that it may be called 



A. petaloidea, var. noveboracensis, n. var., foliis basilaribua oblanceo- 

 latis vel anguste obovatis acutis 1.5-4 cm. longis 0.5-1.2 cm. lalis; caule 

 florifero 0.4-2.3 dm. alto regulariter foliato; corymbo subconferto, ramibi;s 

 pedicellisque brevibus; bracteis involucri petaloideis. 



Basal leaves oblanceolate or narrowly obovate, acute, 1.5-4 cm. long, 

 0.5-1.2 cm. broad: flowering stem 0.4-2.3 dm. high, regularly leafy: corymb 

 rather crowded; its branches and pedicels short: involucraf bracts peta'loid. 

 — New York: along Beaver Brook, south of McLean, Dryden, May 17, 

 1918, Eaines & Wiegand, no. 10,953; dry gravelly knolls around Mallorvville 

 bog, Dryden, May 16, 1919, Barnes; dry bank along railroad northeast of 

 Freeville, May 16, 1919, Eaines; upper Cascadilla Creek, May 20, 1919, Eames; 

 dry pasture, Caroline, May 18, 1918, Eames, no. 10,951; gravelly fields, Car- 

 oline, May 20, 1918, Eames, nos. 10,946 and 10,950; drv fields, east of North 

 Pinnacle, Caroline, May 8, 1919, Eames; field northeast of Fir-tree Swamp, 

 Danby, May 18, 1918, Eames, nos. 10,952 and 10,954; Buttermilk Creek, 

 May 13, 1919, Eames; pasture, east side of Michigan Hollow Swamp, Danby, 

 May 30, 1919, Wiegand; dry fields near Key Hill Swamp, Newfield, May 

 21, 1919, Eames & Wiegand (type in Gray Herb.); sterile hill near Kennedy 

 Pond, Mendon, June 2, 1917, Eames A Metcalf, no. 8936. 



On account of its narrow leaves and rather dense corymb var. novebora- 

 censis is likely to be confused with undeveloped A. neglecta, but in that spe- 

 cies the upper cauline leaves instead of having firm subulate-aristate tips, 

 bear thin scarious though often involute appendages. 



