GLOSSARY. 



581 



used especially as opposed to 

 concave, convex, revolute, etc. 



Plumose, finely and abundantly 

 branched, like a plume. 



Polygamous, having perfect, pis- 

 tillate and staminate flowers 

 on the same individuals 

 (polygamo-monoecious) or on 

 different individuals (polyg- 

 amo-dioecious). 



Posterior, the side behind, in an 

 axillary flower the side next to 

 the axis; superior. 



Prickly, armed with prickles or 

 short sharp hard outgrowths of 

 the epiderms of leaves or stems. 



Prismatic, shaped like a prism, 

 with flat faces separated by 

 angles. 



Proliferous, bearing supplemen- 

 tary flowering branches or 

 shoots from or near the sum- 

 mit or from the inflorescence, 

 which surpass the stem or in- 

 floresence. 



Prostrate, lying close along the 

 ground. 



Puberulent, minutely pubescent. 

 Pubescent, clothed with hairs, 



especially soft or downy hairs. 

 Pungent, terminating in a rigid. 



sharp or prickly point. 

 Pustulate, dilated. 

 Quinate, borne in or divided into 



fives. 



Raceme, a flower cluster in which 

 the flowers are borne along the 

 peduncle on pedicels of nearly 

 equal length. 



Racemose, like a raceme. 



Rachilla, in Graminese, the axis 

 of a spikelet, on which the 

 bractlets and palea\ with their 

 enclosed flowers, are borne. See 

 Rachis. 



Rachis, the axis of a spike or 

 raceme, the prolongation of the 

 peduncle through the flower 

 cluster; the axis or midrib of a 



compound leaf or prolongation 

 of the petiole; in Gramineai 

 the main axis and branches of 

 an inflorescene, on which the 

 spikelets are borne. See Ra- 

 chilla. 



Radiate, in the Sunflower Family, 

 the heads with ray-flowers or 

 ligulate corollas. 



Radical, leaves are called radical 

 when inserted so closely to the 

 base of the stem as to appear 

 to come from the root; or when 

 arising from a rootstock or 

 other underground organ. 



Rameal leaves, leaves borne on 

 the branches. 



Ra?iks, successive rows. 



Ray, in the Parsley Family, one 

 of the primary branches of an 

 umbel; ray in the Sunflower 

 Family, one of the marginal 

 flowers bearing a ligulate 

 corolla. 



Receptacle, in a flower, that por- 

 tion of the stem on which the 

 sepals, petals, stamens and 

 pistils are borne; receptacle of 

 the inflorescence is the axis of 

 such a dense cluster as a head 

 in the Sunflower Family. 



Reflexed, bent or turned down- 

 ward. 



Refracted, bent abruptly down- 

 ward or backward from the 

 base, as if broken, as a pedicel 

 on its stem or peduncle. 



Regular, the parts in circle hav- 

 ing the same size and shape. 



Reniform, kidney-shaped. 



Repand, with slightly uneven 

 margin. 



Reticulated, with a network; 

 netted. 



Refuse, with a broad shallow 

 notch . 



Revolute, rolled backward from 



each side. 

 Rib, a primary vein of a leaf. 



