204 Flora of the Palousc Region 



Palet. See page 14. 



Panicle. A branched raceme. 



Paniculate. Arranged in a panicle. 



Pappus. The hairs, bristles or scales surmounting the akene of the Com- 



positae. 

 Pectinate. Comb-like. 

 Pellucid. Semi-transparent. 

 Penultimate. Next to the last. 

 Pericarp. The wall of a ripened ovary. 

 Perigynium. See page 36. 

 Per igy nous. On the calyx. 

 Pilose. With a few short soft hairs. 

 Plumose. Plume-like. 



J'ollinia. Pollen-masses composed of united pollen-grains. 

 Polygamous. Said of a plant that bears perfect flowers and also either stam- 



inate or pistillate. 

 Puberulent. Very minutely pubescent. 

 Pubescence. Hairiness. 



Pubescent. Covered with hairs of any sort, but especially with short soft hairs. 

 Pulvinus. A cushion-like swelling. 

 Pyriform. Pear-shaped. 



Rachilla. The axis of a spikelet: see page 14. 



Pact/is. The axis of a spike. 



Padiate. Bearing ray-flowers: diverging from a center. 



Radical. Pertaining to the. base of the stem: growing at the base of the stem. 



Pay. A. radiating branch of an umbel: the marginal flowers of a head when 



their corollas are strap-shaped and different from the others. 

 Reticulated. Netted or net-like. 

 Retrorse. Turned or bent backward. 

 Raphe. The ridge of an anatropous seed formed by the stalk growing to the 



ovule. 

 Rugose. Wrinkled or roughened. 

 Rugulose. Slightly rugose. 



Sagittate. Shaped like an arrow-head. 

 Salient. Prominent. 



Samara. An akene-like fruit with the pericarp extending into a wing. 

 Scabrous. Harsh ; beset with short hard hairs or points. 

 Scarious. Dry and papery. 

 Sccuud. One- sided. 



Scpticidat. Said of a capsule which dehisces by splitting through the par- 

 titions between the cells or cavities. 

 Serratures. Marginal teeth. 

 Serrulate. With very small serrate teeth. 

 Setaceous. Bristle-like. 

 Sordid. Dirty-white. 



