Dorsal Suture 



OF BOTANICAL TERMS. 



Duramen 



outer, or normally lower sur- 

 face. Some botanists, how- 

 ever, apply the term dorsal to 

 the upper surface. Compare 

 Ventral. 



DORSAL SU'TURE, oue situated 

 at the midrib of the carpellary 

 leaf. 



DdRSlCUM'BENT, see Supine. 



DORSIFEROUS, bearing the fruit 

 upon the back, as the spores of 

 many ferns; dorsiparous. 



DORSiP'AROUS, see Dorsifer- 

 ous. 



DORSIVflN'TRAL, having a dis- 

 tinct front and back, as leaves. 



DOR' SUM, the back of any organ: 

 the outer or lower surface of 

 leaves or parts of a flower. 

 See also Dorsal. 



D6r'TY, (Hort.), delicate; diffi- 

 cult to cultivate. (Rare.) 



DdT'TED, see Punctate. 



DdT'TflD DUCT, see Pitted 

 Vessel. 



DOUB'LE, having more than one 

 whorl of petals. A flower is 

 completely double when all 

 the essential organs are re- 

 placed by petals. 



DOUB'LY-COM'FOUND, twice 

 compound, as bipinnate or 

 bipalmate. 



DOUB'LY-CRE'NATE, having the 

 denatures or teeth of a cre- 

 nate leaf again eremite. 



DOUB'LY-DEN'TATE, having the 

 teeth of a dentate leaf dentate. 

 Compare Bidentate. 



DOUB'LY-PIN'NATE, see Bipin- 

 nate. 



DOUB'LY-SER'RATE, having 

 small serratures upon the large 

 ones, as in the elm. Compare 

 Biserrate. 



DOUB'LY-TER'NATE, see Bi- 

 ternate. 



DOUBLY-TOOTHED, having the 

 teeth themselves toothed, as in 

 Doubly-dentate. 



DOWN, soft short pubescence. 



DOWN'Y, having a dense cover- 

 ing of short weak hairs. 



DRAWN, elongated by absence of 

 light, as plants which are 

 crowded together. 



DREP'ANiFORM, see Falcate. 



DROOPING, inclining downward 

 more than cernous and less 

 than pendent or pendulous. 



DRUPA'CEOUS, like, or pertain- 

 ing to, a drupe; producing 

 drupes, as drupaceous trees. 



DRUPE, a stone-fruit, as the 

 peach, almond, aud cherry. 

 It consists of one carpel, with 

 usually a single seed surround- 

 ed by a thickened bony endo- 

 carp called the pit or stone. 



DRU'PEL, a very small drupe, as 

 the so-called seeds of the black- 

 berry. 



DRUPE'LET, see Drupel. 



DU'BIOUS, doubtful. 



DUCT, see Vessel. 



DUL'ClS, devoid of acidity: 

 sweet. 



DUMOSE , having the form of a 

 bush or low compact shrub. 



DU'MUS, see Bush. 



DU'PLICATE, doubled or folded. 



DU'PLlCATE-CRE'NATE, see 

 Doubly-crenate. 



DU'PLIcATE-DEN'TATE, see 

 Doubly-dentate. 



DU'PLlCATE-SER'RATE, see 

 Doubly-serrate. 



DURA'MflN, heart-wood; the cen- 

 tral portion of the trunk of 

 most exogens, consisting of 

 wood of darker color and 

 denser texture than the outer 

 newer layers, and possessing 



59 



