The Plants of Michigan - BestLightNovel.com
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249d. Heads in panicles or irregular cl.u.s.ters --253.
250a. Leaves rigid, linear-lanceolate =Aster, Aster ptarmicoides.=
250b. Leaves not rigid, lanceolate =Aster, Aster umbellatus.=
251a. Leaves lanceolate, sharply serrate --252.
251b. Leaves linear or narrowly linear-lanceolate, only the larger ones with a few teeth near the middle =Aster, Aster vimineus.=
252a. Stem glabrous or somewhat p.u.b.escent =Aster, Aster lateriflorus.=
252b. Stem woolly with long hairs =Aster, Aster lateriflorus var. hirsuticaulis.=
253a. Bracts narrow, approximately equal in length =Aster, Aster longifolius.=
253b. Bracts of several lengths, the outer successively shorter --254.
254a. Heads 10-15 mm. wide, including the rays =Aster, Aster tradescanti.=
254b. Heads 15-25 mm. wide, including the rays --255.
255a. Bracts with conspicuous dilated or subrhombic tips =Aster, Aster salicifolius.=
255b. Bracts without conspicuous green tips --256.
256a. Rays purple or rose; bog plant with linear leaves =Aster, Aster junceus.=
256b. Rays white, or slightly tinged with blue; leaves oblong to narrowly lanceolate =Aster, Aster paniculatus.=
GLOSSARY
=Achene.= A small, dry, hard, seed-like fruit containing a single seed.
=Ac.u.minate.= Taper-pointed.
=Acute.= Ending with an acute angle.
=Alternate.= Located singly on the stem, with other leaves above or below.
=Annual.= Living but a single season.
=Anther.= The (usually) enlarged end of a stamen, bearing the pollen.
=Ascending.= Rising or curving obliquely upward.
=Auricle.= An ear-shape appendage at the base of a leaf or other organ.
=Auricled, auriculate.= Furnished with auricles.
=Awl-shape.= Tapering to a slender stiff point.
=Awn.= An awl-shape or bristle-shape appendage.
=Axil.= The point on a stem just above the base of a leaf or branch.
=Axillary.= Arising from or produced in the axil.
=Basal.= Arising from or produced at the base.
=Beak.= Ending in a prominent slender point.
=Bract.= A small leaf near the base of a flower or flower-stalk, or in a flower-cl.u.s.ter.
=Bracteal.= An adjective derived from bract.
=Bipinnate.= A leaf with a pinnately branched axis, bearing leaflets on the sides of the branches.
=Calyx.= The outer portion of the flower, usually green in color. In some plants it is colored to resemble (or replace) the corolla, and in others may be minute or wanting.
=Capitate.= Shaped like a head; or arranged in a dense compact cl.u.s.ter.
=Capsule.= A dry fruit with usually several seeds, opening at maturity.
=Catkin.= A cylindrical or ovoid cl.u.s.ter of inconspicuous flowers, for example, the "p.u.s.s.y willow."
=Cells of ovary.= The cavity or cavities within an ovary, in which the seeds are produced.
=Ciliate.= Provided with hairs at the margin.
=Clasping.= With the base of a leaf or other organ wholly or partly surrounding the stem.
=Cleft.= Deeply divided toward the base or the mid-rib.
=Closed sheath.= A leaf-sheath in which the margins are united to form a tube.
=Composite.= A flower-cl.u.s.ter containing several or many small flowers, closely crowded together and provided with calyx-like bracts, so that the whole cl.u.s.ter resembles a single flower.
=Compound.= Composed of 2 or more similar parts united, as a compound ovary.
=Compound leaf.= A leaf with two or more separate leaflets on a single petiole.
=Connate.= Grown together.
=Cordate.= Heart-shape. A whole leaf-blade may be cordate, or the term may be applied to the base of a leaf only.
