COMPOSITiE. 169 



New York Flora, this plant appears to be a true Aster. It has been referred to 

 several different genera. Ptarmicoid Aster. 



***** Scales of the involucre membranaceous or with membranaceous mar- 

 gins, destitute of herbaceous tips. Receptacle somewhat alveolate. Bristles 

 of t/ie pappus capillary, nearly equal. Leaves thickish or succulent. Ox- 

 YTRIPOLIUM D. C. 



36. A.flexuosus Nutt. : stem very smooth, flexuous, sparingly branched ; 

 branches mostly terminated by large soUtary heads ; cauline leaves Unear ; 

 lower lanceolate-linear, fleshy, acute, tapering to the base ; those of the 

 branchlets subulate ; scales of the campanulate involucre lanceolate-acu- 

 minate. A. sparsiflorus Pursh. Tripolium flexuosum D. C. 



Salt marshes. Mass. to Flor. Sept.— Nov. %.—Stem 1—2 feet liigh, 

 usually with a few spreading branches at the summit. Heads 1 — 2 on the 

 branchlets, large ; rays pale purple ; disk yellow. 



Perennial Salt-marsh Aster. 



37. A. linifolius Linn. : very smooth ; stem erect, racemosely branched 

 from the base ; branches erect, spreading ; leaves lanceolate-linear, acumi- 

 nate, narrowed at base ; scales of the cyUndric involucre linear-subulate ; 

 rays scarcely longer than the pappus. A. subulatus Mich. Tripolium, 

 subulatum D. C. 



Salt marshes. Mass. to Car. Sept.— Nov. (X). — Stem about 2 feet high, 

 striate -angular, with numerous spreading branches. Heads very snaall, in a 

 loose terminal panicle; rays short, pale puiple or nearly white. 



Annual SaU-mxirsh Aster. 



12. GALATELLA. Cass.— Galatella. 

 (Origin unknowTi.) 



Heads radiate; rays in one series, neutral or bearing an 

 abortive style; disk-florets tubular, fertile. Involucre with 

 the imbricate scales shorter than the disk ; outer scales often 

 3 -nerved. Receptacle alveolate ; the alveolar margins toothed. 

 Achenia densely hirsute or silky- villous. Pappus consisting of 

 numerous scabrous filiform bristles. 



1. G. linifolia Nees. : stem erect, corymbose at the summit ; leaves linear, 

 entire, punctate, roughish, 1-nerved ; branchlets with a single head, and 

 having the leaves linear-subulate and becoming smaller ; scales of the in- 

 volucre lanceolate, acute, the margins somewhat membranaceous ; rays not 

 exceeding the disk. Chrysopsis linifolia Nutt. 



Shady woods. Penn. to Virg. Sept., Oct. %.—Stem 12 — 18 inches high, 

 terete. Heads rather large ; rays few, white or pale purple. Perhaps not dis- 

 tinct frcm the next. Flax-leaved Galatella. 



2. G. hyssopifolia Nees. : stem erect, corymbose at the summit ; the 

 branches spreading ; leaves lanceolate-linear, acute, entire, rough, 3-nerved, 

 punctate ; those of the branchlets Unear-subulate ; scales of the involucre 

 acutish ; rays elongated. Aster hyssopifolius Linn. 



Sandy fields. N. J. to Car. Aug.— Oct. %.—Stem 1—2 feet high, smooth. 

 Heads in small terminal fastigiate corymbs ; rays 5 — 10, white or pale purple. 



Hyssop-leaved Galatella. 

 8 



