GLOSSARY. 



277 



Perigynous, inserted on the calyx. 

 Persistent, remaining after other 



parts have fallen away. 

 Personate, applied to a labiate 



corolla with the throat closed by 



an upward projection of the lower 



lip. 



Petal, one of the pieces of a corolla. 

 Petaloid, petal-like. 

 Petiolate, having a petiole. 

 Petiole, having a leaf-stalk. 

 Phanerogamous, having flowers 



and producing seeds. 



Pilose, with soft hairs. 



Pinna, a primary division of a 



frond. 

 Pinnate, with veins or leaflets 



proceeding from each side of a 



mid-rib. 

 Pinnatifld, deeply pinnately cleft. 



Pinnule, a secondary division of a 



frond ; one of the divisions of a 



pinna. 

 Pistil, the seed-bearing organ of 



the flower. 

 Pistillate, having pistil but no 



stamens. 

 Pitted, marked with small pits or 



depressions. 

 Placenta, the ridge or projection 



in the ovary to which the ovules 



are attached. 

 Plicate, folded into plaits. 



Plumose, feathery ; with fine hairs 

 on each side of the axis. 



Pod, any dry dehiscent fruit. 



Pollen, the grains produced in the 



anther. 

 Pollinium (plural pollinia), a mass 



of pollen, as in Milkweeds 



Orchids. 



and 



Polypetalous, having petals sep- 

 arate from each other. 



Pome, an inferior syncarpous fruit 

 with a largely developed adherent 

 calyx, as the apple. 



Posterior, the side next the axis. 



Procumbent, lying flat on the 

 ground. 



Prostrate, the same as procum- 

 bent. 



Puberulent, minutely pubescent. 



Pubescent, covered with fine short 



hairs. 

 Punctate, showing transparent 



dots when held up to the lignt. 

 Pungent, acrid to the taste. 



R. 



Raceme, a flower-cluster of lateral 

 flowers, each on a pedicel of its 

 own. 



Racemose, in racemes ; resem- 

 bling a raceme. 



Radiate, spreading from a centre ; 

 bearing ray-florets. 



Radical, proceeding from the base 

 of the stem. 



Ray, the branch of an umbel : the 

 circle of marginal florets in a 

 composite flower, as distinguished 

 from the disk. 



Receptacle, the enlarged top of 

 the flower-stalk. 



Recurved, curved backward. 



Reflexed, bent backward or down- 

 ward. 



Regular, with all the parts of the 

 organ of the same size and shape. 



Reniform, kidney-shaped. 



Repand, with a margin resembling 

 that of an expanded umbrella. 



Reticulate, in the form of a net- 

 work. 



Retuse, with a shallow notch at 

 the end. 



Revolute, rolled backward from 

 the margin. 



Rhachis, the axis of a frond or 

 compound leaf. 



Rhizome, an underground stem; 

 a rojtstock. 



Rib, one of the main veins of a leaf. 



Ringeiit, wide open, gaping. 



Rootstock, an underground stem. 



Rotate, wheel-shaped. 



Rudimentary, but slightly de- 

 veloped. 



Rugose, wrinkled. 



Runcinate, with teeth on the 

 margin pointing backward. 



Runner, a thread-like prostrate 

 branch, proceeding from the base 

 of a stem, and rooting at the ex- 

 tremity. 



