223). 
A. praealtus Poir. Aster 
Java Farm. One station: freshwater part of Fox Creek drainage 
marsh. Hectare 3526. Associate species: Impatiens capensis, 
Sambucus canadensis, Salix nigra, Scirpus rubricosus. Higman 492. 
A. simplex Willd. Aster 
Java Farm. One station: south-facing slope above tidal portion 
of Muddy Creek. Source of small tributary; hectare 3426. Canopy 
of Liquidambar styraciflua, Fagus grandifolia, Liriodendron tulipifera, 
Juglans nigra. Associate species: Carex lurida, Saururus cernuus. 
Higman 398. 
Erigeron 
1. Involucre campanulate; rays minute and in several 
rows, Or wanting. 
2. Stem glabrous except sometimes at base; leaves 
bristly-ciliate only at base; phyllaries with 
a dark purple apical spot. Expected (E. pusillus). 
2. Stem spreading-hirsute throughout; leaves 
bristly-ciliate to tip, hispid; phyllaries 
without dark apical SpoOt.....c.sessccvcccescereseses Be Canadensis 
1. Involucre saucer-shaped to hemispheric; rays 
spreading, conspicuous. 
3. Cauline leaves sessile, with rounded or sub- 
clasping bases; disc-corollas 2.5 to 4.5 mm. 
long; pappus simple. 
4. Long, superficial stolons present; heads 
ito 73 rays! about 503 idisc corollas) 345 
to 4.5 mm. long. Expected (E. pulchellus). 
4, Long, superficial stolons absent; heads 
more numerous; rays 100 or more; disc-corollas 
2.5 to 3.5 mm. long. (Also, stem long- 
pilose below). 1. o« ss slelelsiosoievorehs 6) «) slefehe eres cceie's ee pL adel phacus 
3. Cauline leaves tapering to base; disc corollas 
1.5 to 2.5 mm. long; pappus of disc-flowers 
double, with a minute outer series. 
