GLOSSARY. 



403 



Papilionaceous. Bucterfly-like, that 

 is having the upper petal enlarged 

 and spreading, the two lateral ones 

 small and oblique, and the two 

 anterior ones connivent into a keel. 



Papillate. Papillose. 



Papillose. Having minute nipple- 

 like projections. 



Pappus. The modified calyx-limb in 

 the Compositae, composed of a 

 ring, a crown of hairs, chaff or 

 scales. 



Parasitic. Depending on another 

 organism for its food-supply. 



Parted. Margin indented nearly but 

 not quite to the midrib. 



Pectinate. Pinnatifid, with narrow 

 close segments; comb-lika. 



Pellucid. Clear, transparent. 



Peltate. Shield-shaped, with its stalk 

 attached near the center of the 

 dorsal surface. 



Penicillaie. In a pencil-shaped tuft. 



Pentamerous {5-merous). Five in 

 number. 



Penultimate. The next to the last. 



Pericarp. The matured ovary wall 

 forming a protective coat in the 

 fruit. 



Perigynium. The inflated sac which 

 encloses the ovary in Carex. 



Perigynous. Around the ovary; that 

 is, adnata to the perianth or to a 

 receptacle-cup. 



Petiolulate. Having a petiolule. 



Petiolule. The stalk of a leaflet. 



Phyllode. An expanded petiole serv- 

 ing as a leaf blade. 



Pilose. With soft hairs. 



Pinnule. One of the smaller sub- 

 divisions of the primary divisions of 

 a pirnately compound leaf. 



Pistil. The organ in the flower which 

 produces the ovules and provides 

 for their pollination. 



Plaited. Folded into parallel folds. 



Plumose. Having fine hairs like a 

 plume. 



Plumule. The growing point or bud 

 of an embryo (epicotyl). 



Pollinium. A mass of waxy pollen 

 composed of coherent pollen-grains 

 {Orchidaceae.) 



Polygamo-dioecious. With perfect 

 and staminate flowers on some 

 plants and perfect and pi'^tillate 

 flowers on others. 



Polygamous. Having both perfect 

 and unisexual flowers on the same 

 plant. 



Precocious. Appearing before the 

 Ipaves (said of the flowers in soine 

 willows). 



Prismatic. Angular with flat sides, 

 like a prism in shape. 



Proliferous. Producing offsets. 



Pruinose. Covered with a whitish 

 powder. 



Puberulent. Minutely pubescent. 



Pubescence. Hairiness. 



Pubescent. Covered with hairs, es- 

 pecially short soft ones. 



Pulvinus. A cushion-like swelling. 



Pzinctate. Dotted. 



Puncticulate. Minutely punctate. 



Pungent. Terminated in a rigid 

 point; penetrating. 



Pustulate. Covered with pustules. 



Pyramidal. Pyramid-like. 



Pyriform. Pear-shaped. 



QuadrifoUolate. With four leaflets. 



Raceme. A simple inflorescence of 

 pedicelled flowers on a common 

 more or less elongated axis. 



Rachilla. The axis of a grass spikelet. 



Rachis. The main axis of an inflor- 

 escence. 



Radiate. Arranged radially from a 

 center; having ray-flowers. 



Radical. Pertaining to the root; oc- 

 curring at the base of the stem. 



Raphe. The ridge on a more or less 

 inverted seed caused by the fusion 

 of the stalk with the seed. 



Ray. A branch of an umbel; a ray- 

 flower. 



Ray-flower. One of the marginal 

 ligulate flowers of a radiate head in 

 the Compositae. 



Receptacle. The modified axis on 

 which the flower parts are borne. 



Reniform. Kidney-shaped. 



Resiniferous. Producing resin. 



Reticulated. In the form of a net- 

 work; net- veined. 



Retrorse. Directed backward. 



Rosulate. In the form of a rosette. 



Rotate. Wheel-shaped; flat and cir- 

 cular in outline. 



Rudiment. A partially developed 

 functionless organ. . 



Rugose. Wrinkled. 



