CAKDUACEAE 1217 



tion and a narrow petiole ; rameals not conspicuous, linear-acute, somewhat appressed : 

 inflorescence irregularly compound-racemose, long and rather narrow, disproportionately 

 large for the plant ; its branches tend to be spreading and short, its peduncles long or at 

 least distinct, its heads medium-sized or less, its rays much darker than in typical A. undu- 

 latus. Peculiar in its strong tendency to become corrigiate, or cross-tied, by developing 

 two conspicuous divaricate narrow-lanceolate leaf-blades (branch-form leaves) in the lower 

 or middle axils of the cauline leaves. 



On dry hillsides, Connecticut and New York to Ohio, Alabama and Louisiana. Fall. 



35. Aster triangulkris Burgess. Plants cinereous green, tall, robust, very rough, with 

 little or no obvious hair, like A. corrigiatus; but with leaves ovate-triangular-acuminate, 

 thicker and with very pronounced acumination. Stem dull reddish brown, somewhat terete, 

 9 dm. high or more : leaves very numerous, sometimes foliosely corrigiate in the axils ; 

 blades not ciliate, beneath with slight short scattered strigose hair, on the upper surface 

 close-set with pale slender rigid aculei pointing chiefly away from the midrib and thick- 

 ened at the base ; leaf-form ovate-triangular, long-acuminate, suddenly contracted at the 

 sessile base, subclasping only : inflorescence rather narrow, of loosely-ascending branches 

 with a brushy top, uniformly close-set or catenate with conspicuous appressed overlapping 

 oblong chain-like bracteals : heads small : rays purple-blue : bracts linear-oblong, their tips 

 apt to be of broad diamond form. [A. undulatus triangularis Burgess.] 



On open sandy slopes, New York to South Carolina and Alabama. Fall. 



36. Aster linguifdnnis Burgess. Small racemose plants with little hair, or cordation, 

 of soft thin texture, tending to great development of elongated linguiform leaves, partly 

 with long strap-like winged petioles, and the upper ones sessile by a broad auricled base ; 

 stem 4-5 dm. high, minutely pubescent only ; leaves tend to be remarkably entire and 

 obtuse, sage-green, closely approximate ; radicals few, narrowly ovate-oblong, but slightly 

 cordated, with rather long slender petioles ; lower caulines lance-oblong, 7x2 cm. or less, 

 abruptly rounded and obtuse at base and apex, often surpassed by the strap-like petiole ; 

 other caulines and branch-leaves sessile-auriculate, prolonged linear-oblong or pandurate- 

 oblong, often rounded-truncate at apex ; axiles linear-acutish : inflorescence usually a loose 

 and nearly simple raceme with small distinct long-pedicelled heads : bracts lax, linear, 

 acute, the green tips rhomboid. 



In dry fertile thickets, near Jacksonville, Florida. Summer and fall. 



37. Aster lorifdrmis Burgess. Plants rough, with but little hair, tall and narrow, 

 with strap-like leaves seldom developing petioles or cordation : stem somewhat purple, ter- 

 ete, erect, brittle, slender, and 4-6 dm. high, or stout and even 12 dm. high : leaves dull 

 green ; blades thick, rigid when dry, rough, only minutely pubescent beneath, their type 

 linear-oblong and obtuse, with sides nearly straight from a sessile clasping base ; margins apt 

 to be much ruffled, often minutely and closely erose, occasionally gashed with a few coarse 

 remote blunt protruding teeth ; petioles slightly developed, though often a few lower leaves 

 slope into a strap-like petiole ; radicals apt to be oval-oblong, with little or no cordation ; 

 upper caulines and axiles linear-lanceolate, acutish, more contracted at the base : as in A. 

 corrigiatus, the inflorescence is tall and narrow, the heads smaller than in A. undulatus and 

 the rays more a blue-purple ; bracts narrower, the green tips diamond-form or lanceolate. 

 [A. undulatus loriformus Burgess.} 



In sand-barrens, Martha's Vineyard, and along the coast to .Florida and Alabama. 



38. Aster Mohrii Burgess. Plants profusely and flagellately branched with very 

 naked bushy inflorescence : stem rough, rigid, with many small dark capitate slender-stalked 

 glands intermixed among strigose hairs ; many of the latter are viscid, becoming broken 

 down 'and irregularly incrassate : leaf-blades long, narrowly linear and grass-like, thickish, 

 harsh, of uniform breadth, minutely rugulose above, obtuse or slightly acute ; petioles 

 obscure, slender or winged ; occasional radical or basal leaves are shorter broader, some- 

 what cordate-lanceolate, and at the slightly shouldered base are contracted into a distinct 

 petiole ; with but obscure or rare sinus and amplexicaul enlargement ; axile leaves and 

 rameal chiefly linear-oblong, clasping by a broad base : heads small, long-peduncled (5-7 

 cm.), racemosely compounded: bracts linear-oblong, acute, green-tips prominent, lance- 

 elliptic : rays reddish purple, 12-15 or less. Fine strigose tomentum extends down the 

 peduncles and much of the stem. Kepresents the extreme attenuation of the A. undulatus 

 types. [A. Baldwinii ,3 T. & G.] 



In sandy soil, Georgia and Florida to Louisiana. Fall. 



39. Aster cldviger Burgess. Plants wand-like, apt to spring several from a common 

 base, with glandular pubescence along the middle of the stem, and with leaves of a crisp 

 firm texture : stem greenish, moderately and finely pubescent, or glabrate, smooth to the 

 eye, about 6 dm. high or more : leaves quite uniform ; blades ovate-oblong, thickish, sub- 



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