In lieu of an abstract, here is a brief excerpt of the content:

439 Achene. Small dry, hard, one-seeded nutlet. Alternate (leaves). Arranged singly along the stem, alternating from one side to the other up the stem. Angled (stem). Having distinct edges; three-angled (triangular in cross-section) and four-angled (square). Annual. Plant living for only one year; propagates from seeds. Anther. Distal end of a stamen where pollen is produced. Apetalous. Lacking petals. Appressed. Closely compacted together, as in an appressed inflorescence. Aromatic. Sweet-smelling. Arrowhead-shaped (leaves). Appearing like an arrowhead, triangular in shape. Ascending. Rising upward and somewhat spreading, as in an ascending inflorescence. Awn. Bristle-shaped appendage. Axil. Angle formed by a leaf or branch with the stem. Axillary. Located in an axil. Axis. The central portion of an organ-bearing structure, as in an inflorescence of a grass the axis bears the spikelets. Barbed. Bearing a short bristle or awn. Basal (leaves). Arising directly from the roots; may ascend along stem as sheaths and appear alternately arranged, as in cattails. Beak. Long, thickened point or tip. Berry. Fleshy or pulpy fruit. Bisexual. Bearing both male and female organs (stamens and pistils) on the same flower. Blade. Flattened leaf. Bract. Leaflike or modified appendage subtending a flower or belonging to an inflorescence. Bristle. Long stiff, hairlike structure. Bud. Unexpanded flower or leaf. Bulb. A short underground stem with fleshy leaves or scales. Callous. Fleshy, thickened tissue, as in the tips of leaf teeth in certain plants. Calyx. Outermost parts of a flower; refers to the sepals, which are usually green but sometimes colored and petal-like (usually referred to as “petals” in this book). Capsule. Dry fruit composed of two or more cells or chambers. Catkin. Scaly spike of inconspicuous flowers lacking petals, usually male or female, as in willows, alders, oaks, and birches. Cell. One of the chambers of a capsule. Channeled. Having distinct grooves or ridges. Cilia. Fringing or marginal hairs. Ciliate. Having a fringe of marginal hairs. Clasping (leaves). Closely surrounding the stem and attached directly without stalk. Coma. A cluster of long, soft hairs on seeds, as in the willow-herbs. Compound (leaves). Divided into two or more distinct, separate parts (leaflets). Coniferous. Cone-bearing. Corm. Enlarged fleshy base of stem; bulblike. Corolla. Petals of a flower. Corymb. Somewhat flat-topped inflorescence with outer flowers blooming first. Cyme. Flowering inflorescence with innermost or terminal flowers blooming first. Deciduous. Not persistent, dropping off plant after completing its function, as with deciduous leaves in the fall. Glossary Decumbent. Reclining or prostrate at base, with the upper part erect or ascending, as in decumbent stems. Diaphragm. Nodal tissue or a partition that separates the pith of some plants, as in grapes. Dichotomous. Two-ranked, forked into two branches of similar size. Dioecious. Having male and female flowers borne on separate plants. Disk. A disklike structure; the tubular group of flowers forming the central head of composites or asters. Disk (flower). Flowers composed of central disk without petals (ray flowers) as in certain members of the Aster Family. Dissected. Deeply divided, often into threadlike parts, as in dissected leaves. Drupe. Fleshy or pulpy fruit having a single stone or pit. Emergent. Herbaceous (nonwoody) plant standing erect. Entire (leaves). Having smooth margins, without teeth. Epiphyte. Type of nonparasitic plant growing on other plants; commonly called “air plant.” Evergreen. Persistent, as in evergreen leaves that remain on plant through winter. Filament. Basal part of a stamen that supports the anther. Fleshy. Soft, thickened tissue; succulent. Follicle. Dry fruit that opens along one line or suture, as in milkweed and bean pods. Frond. Leaf of a fern. Gland. Secreting structure or organ. Glandular. Bearing glands. Glomerule. Compact somewhat roundish flowering head. Glume. Thin bract at the base of a grass spikelet. Grain. Fruit of certain grasses. Head. Dense cluster of sessile or nearly sessile flowers, characteristic of composites or asters. Heart-shaped. Somewhat rounded toward the base of the structure, with rounded lobes as in the bases of certain leaves; general shape appearing as an upside-down heart, see Pickerelweed leaf, for example. Herbaceous. Nonwoody. Hood. Erect, outermost “petals” of milkweed flowers. Horn. Erect, inner tubular structure of milkweed flowers. Inflorescence. Flowering part of a plant. Internode. Portion of a stem between two nodes. Irregular (flower). Similar parts (e.g., petals) differing in size and/or shape. Irregularly flooded. Flooded by tides less than once daily. Involucre bracts. Reduced leaves (narrow leaflike to thick bristlelike) at the base of a flower or cluster of flowers; common in the Aster Family...

Share