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GLOSSARY 



Radiant. With the marginal flowers 

 enlarged and ray-like. 



Radiate. Bearing ray-flowers; spreading 

 from or arranged around a common 

 center. 



Radical. Belonging to the root, or ap- 

 parently coming from the root. 



Radicle. The rudimentary stem of the 

 embryo; hypocotyl. 



Rameal. Belonging to a branch. 



Ramification. Branching. 



Ray. One of the peduncles or branches 

 of an umbel; the fiat marginal flowers 

 in Compositae. 



Receptacle. The end of the flower stalk, 

 bearing the floral organs ; or, in Composi- 

 tae, bearing the flowers; also in some 

 ferns, an axis bearing sporanges. 



Reclined. Turned or curved downwards. 



Recurved. Curved backwards. 



Reflexed. Bent backward abruptly. 



Regular. Having the members of each 

 part alike in size and shape. 



Reniform. Kidney-shaped. 



Repand. With a somewhat wavy mar- 

 gin. 



Replicate. That form of vernation in 

 which the apex of the leaf is bent back- 

 ward toward the base. 



Replum. The septum of certain pods 

 that persists after the valves have fal- 

 len away. 



Resiniferous. Producing resin. 



Reticulate. In the form of network. 



Retrorse. Directed back or downward. 



Reiuse. With a shallow notch at a 

 rounded apex. 



Revolute. Rolled backward. 



Rhaceola. The prolongation of the secon- 

 dary axis at the spikelets of sedges, 

 within the perigynium; compare ra- 

 chilla. 



Rhachis. See Eachis. 



Rhizome. See Rootstock. 



Rhombic, Rhomboidal. Somewhat lozenge- 

 shaped; obliquely four-sided. 



Rib. A primary or prominent vein of a 

 leaf. 



Ringent. Gaping, as the mouth of an 

 open bUabiate corolla. 



Rostellum. Beak of the style in Orchids. 



Rostrate. Bearing a beak or a prolonged 

 appendage. 



Rosulate. In the form of a rosette, 



Rosuliferous. Bearing rosettes. 



Rotate (corolla). Wheel-shaped; flat and 

 circular in outline. 



Rotund. Rounded in outline. 



Rudiment. A very partially developed 

 ■ organ; a vestige. 



Rudimentary. Imperfectly developed, or 

 in an early stage of development. 



Rufous. Reddish brown. 



Rugose. Wrinkled. 



Runcinaie. Sharply pinnatifld or Incised, 

 the lobes or segments turned backward. 



Runner. A filiform or very slender stolon. 



Sac. A pouch, especially the cavities of 



anthers. 

 Saccate. Like a sac or pouch; furnished 



with a sac. 

 Sagittate. Like an arrow-head, with the 



lobes turned downward. 

 Salver-shaped (corolla). Having a slender 



tube abruptly exjjanded into a flat limb. 

 Samara. An indehiscent winged fruit. 

 Saprophyte. A plant which grows on 



dead organic matter. 

 Scabrous. Rough to the touch. 



Scale. A minutej rudimentary, or vestig- 

 ial leaf. 



Scape. A peduncle rising from the ground, 

 naked or without proper foliage. 



Scapose. Bearing or resembling a scape. 



Scarious. Thin, dry, and translucent, not 

 green. 



Scorpioid. Coiled up in the bud, or in the 

 beginning of growth, unrolling in ex- 

 panding. 



Scrobiculatc. Possessing minute or shal- 

 low depressions. 



Secund. Borne along one side of an axis. 



Segment. One of the parts of a leaf or 

 other like organ that is cleft or divided. 



Semi- (in compounds) means half. 



Sepal. One of the leaves of a calyx. 



Septate. Divided in compartments by 

 cross-partitions. 



Septicidal (capsule). Dehiscing through 

 the partitions and between the cells. 



Septum (plural septa). A partition, as of 

 a pod, etc. 



Sericeous. Silky; clothed with satiny 

 pubescence. 



Serrate. Having teeth pointing forward. 



Serrulate. Finely serrate. 



Sessile. Without a stalk. 



Seta (-ae). A bristle, or a slender body re- 

 sembling a bristle. 



Setaceous. Bristle-like. 



Setose. Bristly. 



Setulose. Having minute bristles. 



Sheath. A tubular envelope, as the lower 

 part of the leaf in grasses. 



Sheathing. Enclosing as by a sheath. 



Silicle. A short silique. 



Silique. The peculiar pod of Brassicaceae. 



Sinuate. Strongly wavy. 



Sinus. The cleft or recess between two 

 lobes. 



Smooth. Without roughness. 



Sobol, Sobole. A creeping underground 

 stem. 



Soboliferous. Bearing underground mostly 

 horizontal branches. 



Sorus (pi. Sori). A heap or cluster, ap- 

 phed to the fruit-dots of ferns. 



Spadiceous. Like or pertaining to a spa- 

 dix. 



Spadix. A fieshy spike of flowers. 



Spathaceous. ResembUng a spathe, fur- 

 nished mth a spathe. 



Spathe. A bract, usuaUy more or less 

 concave, subtending a spadix. 



Spatulate. Shaped Uke a spatula; spoon- 

 shaped. 



Spermalozoid. A motile ciUated male re- 

 productive cell. 



Spicate. Arranged in or resembling a spike. 



Spiciform. Spike-Uke. 



Spike. An elongate flower-cluster, with 

 sessile or nearly sessile flowers. 



Spikelet. Diminutive of spike; especially 

 applied to flower-clusters of grasses and 

 sedges. 



Spine. A sharp woody or rigid outgrowth 

 from the stem. 



Spinescent. Tipped by or degenerating 

 into spines or thorns. 



Spinose. Thorny; with spines or similar 

 to spines. 



Spiricle. DeUcate coiled thread on the 

 surface of seeds and achenes. 



Spirilliferous. Bearing or having spiricles. 



Spirillum (.-a). A little coil, spiricle. 



Sporange, Sporangium (-a). A sac contain- 

 ing spores. 



Spore. The reproductive organ in Cryp- 

 togams which corresponds to a seed. 



