GLOSSARY. 
113 
Rhombic, rhomboidal. Obliquely four-sided. 
Rib. A primary or prominent vein of a leaf. 
Ringent. Gaping, as tbe mouth of an open, bilabiate corolla. 
Root. Underground part of a plant which supplies it with nourishment. 
Rootstock. Same as rhizome. 
Rostrate. Having a beak. 
Rosulate. In the form of a rosette. 
Rotate (corolla). Whorl-shaped, fiat and circular in outline. 
Rotund. Rounded in outline. 
Rudiment. A very insufficiently developed organ. 
Rudimentary. Only slightly developed. 
Rufous. Reddish-brown. 
Rugose. Wrinkled. 
Runcinate. Sharply incised, with the segments directed backward. 
Runner. A filiform; or very slender stolon. 
Saccate. Sac-sliaped. 
Sagittate. Shaped like an arrow-head, the basal lobes directed downward. 
Salver-shaped (corolla). Having a slender tube abruptly expanded into 
a flat limb. 
Samara. An indehiscent winged fruit. 
Scabrous. Rough to the touch. 
Scalariform (vessels). Having transverse markings, like the rounds of a 
ladder. 
Scape. Peduncle rising from the ground, naked or without proper foliage. 
Scapose. Bearing or resembling a scape. 
Scarious. Thin, dry and membranaceous, not green. 
Scobiform. Sawdust-like; aborted seeds in Liquidambar. 
Scorpioid (inflorescence). Circinately coiled while in bud. 
Scurf. Small bran-like scales on the epidermis. 
Scymitar-shaped (leaf). Curved, with flat triangular section, the straighter 
edge the thickest. 
Seed. The ripened ovule, consisting of the embryo 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. 
Septicidal (capsule). Dehiscing through the partitions and between the 
cells. 
Septum. Any kind of partition. 
Serrate. Having teeth pointed forward. 
Serrulate. Finely serrate. 
Sessile. Without footstalk of any kind. 
Setaceous. Bristle-like. 
Setose. Beset with bristles. 
Sheath. A tubular envelope, as the lower part of a leaf in Grasses. 
Sheathing. Enclosing by a sheath. 
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