GLOSSARY 255 



Re-cep'ta-cle. Tlie apex of the flower stalk, fiom which the organs of the 

 flower grow. 



Reg'u-lar. Having all the parts of the same kind alike in size and shape. 



Res'pi-ra'tion. Breathing; the absorption by plants of oxygen; the oxida- 

 tion of assimilated products, and the release of carbon dioxide and 

 watery vapor. 



Rha'chis. The axis of a spike inflorescence. 



Rha'phe. The continuation of the seed stalk along the side of an anatropous 

 ovule or seed, forming a ridge or seam. 



Rhi^zome. An underground stem. 



Root. The descending axis of a plant; the part of a plant that grows down- 

 ward into the ground. It bears no true buds. 



Root' cap. A mass of dead cells which cover and protect the growing cells 

 at the end of a root. 



Root' stock. Same as rhizome. 



Sag'it-tate. Arrow shaped. 



Sam'a-ra. Indehiscent, winged fruit. 



Sap. The watery fluid taken up by the root, and moved through the vessel 



up to the leaves. 

 Sap' wood. The last growth of wood in an exogen. 

 Seed. Matured ovule. 

 Se'pal, One of the parts of the calyx. 

 Ses'sile. Without stean. 

 Sol'i-ta-ry. Growing alone or singly. 

 So'rus. A fruit dot of ferns. 

 Spa'dix. A spike with a fleshy axis. 



Spathe. A large bract, or a pair of bracts, inclosing a flower cluster. 

 Spike. An inflorescence in which the flowers' are sessile on a lengthened 



axis. 

 Spo-ran'gi-um. A spore case in cryptogamous plants. 

 Spore. A reproductive grain in flowerless plants, analogous to a seed in 



flowering plants. 

 Sta'mens. The organs that produce pollen, consisting of fllament and 



anther. 

 Sto'lon. A branch at the base of a plant which roots easily. 

 Sto'ma. One of the openings in the epidermis of a leaf; a breathing pore. 

 Style. That part of the pistil between the ovary and the stigma. 

 Su-pe'ri-or. Above the ovary. 

 Su-pe'ri-or o'va-ry. Ovary free from calyx. 

 Sym-pet'al-ous. Having the petals united; gamoix'talous. 



