1920] Wiegand,—Additional Notes on Amelanchier 151 
persistent tomentum, more regular veins and slightly shorter petals. 
From the latter it differs in the more obtuse leaves, much larger 
hypanthium, longer petals, and more open fruiting inflorescence. 
The plant grows on sand dunes in Michigan but on limestone rocky 
banks in other portions of its range. "These two soils at first seem 
contradictory in nature, but the sands of Huron County are under- 
laid by limestone, and are, judging from other plants in the vicinity, 
more or less calcareous. A. huronensis is probably a calciphile. 
This species together with A. humilis probably forms the basis of 
the records of A. florida Lindl. from the region of the Great Lakes. 
A. HURONENSIS 
A. GRANDIFLORA 
A. SANGUINEA 
Soil: Calciphile. Calciphile. Neutral or acid clay 
or gravel over 
sandstones. 
Habit: Not in clumps. Not in clumps. In substoloniferous 
clumps. 
Leaves: Broadly oval, ob- Ovate-oval, sub- Ovate-oval, sub- 
tuse. acute. acute. 
Veins: Parallel. Irregular, more Parallel. 
laevis-like. 
Tomen- Persistent. Early deciduous. Persistent. 
tum: 
Racemes: Loose, lower pedi- Loose, lower pedi- Denser, lower pedi- 
A cels long. dels long. cels short. 
Lower Fl. 15-20 mm., fr. Fl. 27-40 mm., long, Fl. 7-10 mm., fr. 7- 
aere 20-30 mm., long. fr. the same. 25 mm. long. 
cels: 
Hypan- Large, 6-8 mm. Large, 7-9 mm. Small, 3.5-6 mm. 
thium broad. broad. broad. 
Petals: 12-16 mm. long, 16-22 mm. long, 2-14 mm. long, 
broad. medium. narrow. 
Length 3-3.5 mm. in fl., 4.5-5 mm. long. 2-3 mm. long. 
of se- 4-5 mm. in fr. 
pals: 
Fresh 0.6 mm. long.? 1.0 mm. long. 0.6 mm. long. 
anthers: 
Farwell (Rep. Mich. Acad. Sci. xvii. 172, 1916) has attempted to 
show that the name Mespilus canadensis L. should be applied to 
what the writer has called A. laevis. The status of this name was 
discussed at length in Ruopora (xiv. 121). The writer there held 
that it is at present impossible to say what Linnaeus meant in the 
Species Plantarum. The description and the reference to Gronovius 
(as far as Gronovius's critical statement is concerned) refer to diff- 
erent plants. We are first able to place the name definitely in the 
Systema, ed. 12, where it clearly applies to the arborescent hairy- 
leaved form. 
ConNELL University, Ithaca, New York. 
