XIV 



GLOSSARY OF BOTANIC TERMS. 



Prostrate:— lying flat on the 



ground. 

 Protandrous:— when the anthers 



of a flower become mature earlier 



than the stigma. 

 Pruriens:— causing an itching 



sensation. 

 Puberulous:— slightly or minutely 



hairy. 

 Puljescent:— clothed with soft hair 



or down. 

 Pulverulentus:— powdered as if 



dusted. 

 Pulvinatus :— cushion-shaped. 

 Pulvinus :— a swelling close under 



the insertion ot a leaf, or the 



swollen base of a petiole, 

 pumilus :— low < r little. 

 Pusillus :— small (^r slender. 

 Pyrene:— a nutlet.as in Lahiatm ; 



also applied to the small stones of 



a drupe. 



Quadrifarius :— in four ranks. 

 ^uinquelocular :— five-ceUed. 



Raceme :— an indefinite form of in- 

 florescence, with an eluugating 

 axis and pedicels equal in length. 



Racemose :— bearing racemes, or 

 raceme -like. 



Radical:— proceeding from or near 

 the root. 



Radicle:— the primary root of a 

 seed plant. 



Raplie :— the adnate f unicle ^ of an 

 anatropous ovule, connecting the 

 hilum with the chalaza, it may be 

 ventral (turned towards the axis) 

 or dorsal von external face of 

 ovule). 



Ray:— the marginal portion of a 

 head or cluster of flowers when 

 distinct, as in some Compositce 

 and Vmbelliferce ; also applied to 

 the radiating branches of an um- 

 bel. 



Receptacle :— usuglly applied to 

 the axis of a flower, that which sup- 

 ports the sepals, petals, stamens 

 and pistil ; also called torus or 

 thalamus. 



Regular :— when the parts of each 

 whorl in a flower are alike. 8e* 

 Actinomorphic. 

 Reniform :— kidney-shaped. 

 Repand:— with slightly uneven 

 margin, not quite sinua.te. 



Repens:— prostrate and rooting. 



Replum:— a frame-like placenta, 

 from which the valves of a capsul e 

 or other dehiscent fr lit fall away 

 as in CruciferoB and Mimosa. 



Resupinate :— upside down, or ap- 

 pearing so. 



Reticulate:— in the form of net- 

 work. 



Retinaculum:— the gland to which 

 one or more pollinia are attached 

 in orchids, applied also to the 

 hook-like funicle as in many of 

 the Acanthacece. 



Retrorse :— directed backward or 

 downward. 



Retuse :— with a shallow notch at a 

 rounded apex. 



Rhachilla:— a secondary axis in 

 the inflorescence of grasses, 



Rhachis:— the axis of an inflores- 

 cence or of a compv^und leaf. 



Rhizome :— a ro> tst ck ( r stem of 

 root-like appearance, pr istrate 

 or underground, and giving off 

 rootlets, the apex progressively 

 sending up steais ^r leaves. 



Rlioml)oid:-approaohinga rhom- 

 bic in iutline; quadrang alar with 

 the lateral angles btuse . 



Rib:— a primary vein. 



Rostellate :— somewhat be iked. 



Rostellum:— a narr ^w extension of 

 the upper edge of the stigma of 

 certain orchids, the aburtive an- 

 terior lobe. 



Rostrate :— beaked. 



Rosulate:— c llectjd in a rosette. 



Rotate :-wheel-shap8d, applied to 

 a spreading gamopetaljus corolla 

 with a short tabe. 



Ruderalis:-gr^wing m waste 

 ground. 



Rufous I— pale reddish-brown. 



Rugose :— wrinkled. 



