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GLOSSARY 



fytadrate. Nearly square in form. 



Raceme,. A simple inflorescence of pediceled 

 flowers upon a common more or less elongated 

 axis. 



Racemose. In racemes ; or resembling a raceme. 



Radiate. Spreading from or arranged around 

 a common center ; bearing ray -flowers. 



Radical. Belonging to or proceeding from the 

 root or base of the stem near the ground. 



Radicle. The portion of the embryo below the 

 cotyledons, more properly called the caudicle. 



Rameal. Belonging to a branch. 



Ramification. Branching. 



Ray. The branch of an umbel; the marginal 

 flowers of an inflorescence when distinct from 

 the disk. 



Receptacle. The more or less expanded or pro- 

 duced portion of an axis which bears the organs 

 of a flower (the torus) or the collected flowers 

 of a head ; any similar structure in Cryptogams. 



Recurved. Curved downward or backward. 



Reflexed. Abruptly bent or turned downward. 



Regular. Uniform in shape or structure. 



Reniform. Kidney-shaped. 



Repand. With a slightly uneven and somewhat 

 sinuate margin. 



Repent. Creeping ; prostrate and rooting at 

 the nodes. 



Resiniferous. Producing resin. 



Resupinate. Turned upside down. 



Reticulate. In the form of network ; net- 

 veined. 



Retrorf,e. Directed back or downward. 



Retuse. With a shallow notch at a rounded 

 apex. 



Re volute. Rolled backward from the margins 

 or apex. 



Rhachilla. A secondary axis ; specifically in the 

 Grasses and Sedges the floral axis as opposed 

 to that of the spike or spikelet. 



Rhachis. The axis of a spike or of a compound 

 leaf. 



Rhaphe. The ridge or adnate funicle which in 

 an anatropous ovule connects the two ends. 



Rhaphides. Needle-shaped crystals often oc- 

 curring in bundles within the cells of certain 

 plants. 



Rhizome. Any prostrate or subterranean stem, 

 usually rooting at the nodes and becoming 

 erect at the apex. 



Rib. A primary or prominent vein of a leaf. 



Ringent. Gaping, as the mouth of an open 

 bilabiate corolla. 



Root. The underground part of a plant which 

 supplies it with nourishment. 



Rootstock. Same as Rhizome. 



Rostelhim. A little beak; a slender extension 

 from the upper edge of the stigma in Orchids. 



Rostrate. Having a beak. 



Rosula. A rosette. 



Rosulate. In the form of a rosette. 



Rotate (corolla). Wheel-shaped ; flat and circu- 

 lar in outline. 



Rufous. Reddish-brown. 



Rugose. Wrinkled. 



Runcinate. Sharply incised, with the segments 



directed backward. 

 Runner. A filiform or very slender stolon. 



Saccate. Sac-shaped. 



Sagittate. Shaped like an arrow-head, the basa? 



lobes directed downward. 

 Salver-shaped (corolla). Having a slender tube 



abruptly expanded into a flat limb. 

 Samara. An indehiscent winged fruit. 

 Scabridulous. Slightly rough. 

 Scabrous. Rough to the touch. 

 Scape. A peduncle rising from the ground, 



naked or without proper foliage. 

 Seapose. Bearing or resembling a scape. 

 Scarious. Thin, dry, and membranaceous, not 



green. 

 Sclerenchymatous. Of sclerenchyma, that is, 



of tissue composed of cells with thickened and 



hardened walls. 

 Scorpioid (inflorescence). Circinately coiled 



while in bud. 



Seed. The ripened ovule, consisting of the em- 

 bryo and its proper coats. 

 Segment. One of the parts of a leaf or other 



like organ that is cleft or divided. 

 Sepal. A division of a calyx. 

 Septate. Divided by partitions. 

 Septicidal (capsule). Dehiscing through the 



partitions and between the cells. 

 Septum. Any kind of partition. 

 Serrate. Having sharp teeth pointing forward. 

 Serrulate. Finely serrate. 

 Sessile. Without footstalk of any kind. 

 Seta. A bristle. 

 Setaceous. Bristle-like. 

 Setiform. Bristle-shaped. 

 Setose. Beset with bristles. 

 Setulose. Having minute bristles. 

 Sheath. A tubular envelope, as the lower part 



of the leaf in Grasses. 

 Sheathing. Inclosing as by a sheath. 

 Shrub. A woody perennial, smaller than a tree, 



usually with several stems. 

 Silicle. A short silique. 

 Silique. The peculiar pod of Cruciferae. 

 Silky. Covered with close-pressed soft and 



straight pubescence. 

 Simple. Of one piece ; not compound. 

 Sinuate. With the outline of the margin 



strongly wavy. 



Sinus. The cleft or recess between two lobes. 

 Smooth. Without roughness or pubescence. 

 Sobole. A shoot, especially from the ground. 

 Soboliferous. Bearing soboles. 

 Sorus (pi. Sori). A heap or cluster, applied to 



the fruit dots of Ferns. 

 Spadix. A spike with a fleshy axis. 

 Spathe. A large bract or pair of bracts inclosing 



an inflorescence. 

 Spatulate. Gradually narrowed downward 



from a rounded summit. 



Sperm atozoid. A motile ciliated male reproduc- 

 tive cell. 



Spicate. Arranged in or resembling a spike. 

 Spictform. Spike-like. 



