558 



Torrey and Grai/s Flora of North America. 



DliC 



DKL 



DEL 



DEN 



Brcumuknt, lyinj^ down. 



UECURauNT, ninninfT down- 



Decursivb, liavin^ a tendency to run d<nvn. 



Dkcussatb, when two riK^t lines cross each other 



at rif^'ht an^'les, they are said to he decussate. 

 DifFRlNolA, R. lirotvn. In memory of Dr. Cliarlea 

 Dueling, an English hotanical author. Linn. 5, 

 Or. 1, Nat. Or. Atnarantacece. Curious but wealc- 

 growing plants. The seed requires to be sown in 

 a hothouse, or hotbed, and when of sufficient size, 

 the plants may be iiotted off, and placed among the 

 stove plants, 

 celoaiolilsa . . . Wliite . 9, S. B. K. Tnd. . . 1004 



Indlcii .... While . 10, S. B. K. Iml. . . 1UU4 



DKFr.EXED, turned downwards, 

 Dhkoi.iatus, deprived of leaves. 



Dkorapjiis, Trinius, Derived from rfj>, twice, and 

 frraphoy to mark. Linn. 3, Or. 2, Nat. Or. Gramineiv. 

 Worthless speciesof grass, growing in any common 

 soil, and increased by divisions at the roots. S.v- 

 nonymes : 1. Phalaris arundinacea. 2. Arundo colo- 

 rata — americdna 1, ariindinlicBci 2, varieffdid. 

 Dehiscent, eraping; an expression applied to the 

 mode in wnich the anthers or the fruit burst open, 

 and discharge their contents. 

 DrlesserTa, Lamour. In honour of M. Benjamin 

 Delessert, a famous French botanical patron. Linn. 

 24, Or. 7, Nat. Or. Algce. Beautiful species, of 

 mostly deep green j4/^rt', found in the ocean, and on 

 the sea-shore — aldidjA. angustlaslnidj A dilatdtdy 

 BonnemaisBntj glajidulBsd, hypogfOssflTn, Jacerdtdj 

 ocelldtd, Plocdtnium, punctdtdf ruscifulldy sanguhiSdj 

 sinuOsd. 

 Dki.ima, Linju From ddimo, to file, or shave off; 

 the leaves are used for polishing. Linn. 13, Or. 1, 

 Nat. Or. Dilleniacere. Very fine climbing plants, 

 growing best in loam, peat, and sand mixed ; 

 ripened cuttings root in sand, under a glass, in 

 heat. 

 nltldS .... S. Ev. CI. Trinidad , 1830 



sarmentosil, 1 . . yellow . S. Ev. CI. Ceylou . . 1820 

 Deltquesgent, melting away upon exposure to aJr. 

 Dei.phinTum, Linn. From delpluny a dolphin; in re- 

 ference to the supposed resemblance in the nectary 

 of the plant to the imaginary figures of the dolphin. 

 Linn. 13, Or. 3, Nat. Or. RanuncutacecB. All the 

 species of Larkspur are showy, and valuable as 

 border flowers, especially D. AJacis and Consolida^ 

 both of which are universally grown among the 

 border annuals. The herbaceous and perennial 

 kinds are increased by divisions, or seeds, and the 

 annual and biennial kinds merely require sowing 

 in tlie open border, where they will flower and seed 

 freely. D. Consolida is regarded as a simple astrin- 

 gent. Synonymes : 1. D. tridaciylon. 2. D. hir- 

 siitum. 3. D. intei-7nediuni. 4. D. Junceum. 5. D. 

 ambiguuni. 

 AconlU .... Purple . 6, H. A. Levant . . 1801 



Ajiioia .... Pink , . 6, H. A. Swilzerl. . 1573 



floTg-plenO . Varieg. . 6, H. A. Europe . . 1573 



albiflflrum . . . White . 7, H. Her. P. Armenia . 1823 

 nlplnum . . . Blue . . 7, H. Her, P. Huiicary 1816 

 nlulleiim . . , Blue . . 7, H. Her. P. AlUia . 1829 



amblgQum . , . Blue . . 6, H. A. Barbary . 1759 



anicenum , . .Pa. blue . 7, H. Her. P. Siberia . 1818 

 azQrfifim . . • Lfft blue 7, H. Her. P. CaroUna . 1805 

 Bi.rlOwH . . . DTt. blue. 8, H. Her. P. Eng. hyb. . 

 cardiopeclltim. . Blue . . 6, H. A. Pvreneea . 1818 



cbeilaiUliiim , . DIt. blue. 5, H. Her. P. Siberia . . 1819 



miiUTplex . . Az. blue 7, H. Her. P. 

 chiiiense . , . Blue . . 7, H. Her. P. China . . 1818 

 ConJiOllda . . . Blue . . 4, H. A England . 



fl0r6-pleu0 . . Vnrieg. . 6, H. A' England . 



cuneatum . . . Blue . . 6, H. Her. P." Siberia . . 181.6 

 dauvcarpfim , . Blue . . 7, H. Hor. P. Caucasus . 1819 

 dictyocfirpum . . Bhie . . 7. H. Her. P. Siberia . . 1817 

 elfltum .... BhiB . . 7, H. Her. P. Siberia . . 1597 

 glfigans . . . Blue . . 7, H. Her. P. N. Amer. , 



fltire-pIeiJC . . Blue . . 7, H. Her. P. N. Amer. . 17-11 

 exaltatum, 1 

 fissum . . 



flexuOsum . . . Blue . . 5, H. Her. P. Chuc^sus . 1820 



grandifloriim . . Dk. blue . 7, H. Her. P. Siberia . . 1816 



ftlbum . . . WliUe . 7, H. Her. P. Gardens . 1816 



flOrft-plCnO . . "Dk. blue . 6, H, Her. P. 



pallidum . . Blue . . 6, H. Her. P. G-irdens . 1820 



hvbridum, 2 , . Blue . . 7, H. Her. P. Siberia . . 1794 



intermedium . , Blue . . 8, H. He». P. Silesia . 1710 



ctorulescSna . . U. blue . 7, H. Her. P. . 1836 



laxiim . . . Blue . . 5, H. Her. P. 



lcptoMUfliJQm3 Blue . . 5, H. Her. P. Pyrenees . 

 pAlIMCim . . Blue . . 7, H. Her. P. , 1836 



piloslHalmum . Blue . , 7. H. Her. P. Siberia . . 

 nuiun.-uIifoUflm Blue . . 7» H. Her. P. Pyrenees . 

 BapphirliiOm . Blue . . H Her. P. 

 laxiflurfim . . . Blue . . 7. H. Her. P. Siberia . 

 MenziesH . , . Blue . . 7. H. Tu. P. N. Amer. . 1826 

 meBolcficam , , Blue . . 7, H. Her. P. . 1822 



3iontflnOm . . . Blue . . 7, H. Her. P. Swilzerl. . 1819 

 br.icleO«Om . . Blue . . 6, H. Her. P. S. Eur. . . 181fl 

 ocbrnleQcum , . White . 6, H. Hor. P. Iberia . . 1823 

 OliveriftnQm . . Blue . . 6, H. A. S.Eur. . . 1826 



piihnatlfrdGm , . Blue . . 7. H. Her. P. Siberia . . 1824 

 glabfillum . . Blue . . 6, H. Hor. P. Siberia , . 181? 

 pentrifiynum . . Blue . . 7, H. Her. P. S. Eur. . . 1819 

 pL'recrrluQm, 4. . Blue . . 7, H. A. Italy . . 1029 



pTctum .... Lgt. blue 6. H. B. S. Eur. . . 1816 



pseud.i.pcrcffTlnum Red . . 6, H. Her. P. Siberia . . 1823 

 pubesccns, 5 . , Blue . . 8, H. A. Mediterr. . 1816 



punlcOfim . , . Purple . 7, H. Her. P. Siberia . . 1785 

 Hequionn . . . Blue . . 7, H. B. Majorca . 1824 



revolutfim . . . Pa. bine . 4, H. Her. P. 

 specirt»am . . . Blue . . 7, H. Her. P. Caucasus . 1816 

 hpurium . . . Blue . . 8, H. Her. P. Siberia . , 1810 

 St.ipbisanrH . . Lgt-blue 7, H. B. S.Eur. . . 1596 



tenuissTmiim . . Purple . 8, H. A. Greece . . 1835 



tricorne. . . . Bb.e . . 7, H. Her. P. N. Amer. . 1806 

 triste .... Blue . . 7. H. Her. P. Dahuria . 1819 

 urceolatum . , Blue . . 6, H. Her. P. . 1801 



vel.itlnuDi . . . Blue . . 7. H. Her. P. Italy . . 1819 

 viUusum . . . Blue . . 7, H. Her. P. Caucasus . 1.818 

 vimlneum . . . Blue . . 8, H. Her. P. N. Amer. . 1835 

 virgaium . . . Blue . . 6, H. A. Syria . . 1823 



DeltX-i-eaved, shaped like the Greek ^^ 

 Deltoidks, triangular. 



DematTum, Persoon. From a diminJitive of dema^ a 

 bundle ; in reference to the mode of growth. Linn. 

 24, Or. 9, Nat. Or. Fungi. An extremely minute 

 species of Fun^i, of a bluish colour, found on the 

 stems of'herbs i^n autumn — articuldtron. 

 Demulcent, having the property of softening any- 

 thing. 

 DendrobTum, Swartz. From dendron, a tree, and 

 bioSf life; in the places of their natural growth, the 

 species are generally found upon trees. Linn. 20, 

 Or. 1, Nat. Or. Orchidaceoe. No orchidaceous plants 

 contribute more to the gaiety of the stove, than the 

 species of this splendid genus. D. nobile, chrysan- 

 thum, Gib3onii, Ji7nbriatmn, densijlomm, and many 

 others, are equalled by few, and certainly not sur- 

 passed, in the beauty of their flowers, by any other 

 orchidaceous plants ; and if the following directions 

 be attended to, they will be found very easy of 

 culture : — All orchidaceous plants require (to culti- 

 vate them successfully), a season of growth, a 

 season of rest, and a season for flowering; all of 

 which should coincide, as much as possible, with 

 the corresponding seasons of those parts of the plobe 

 which they so profusely inhabit ; and the species of 

 this genus should especially be subjected to a chjinge 

 of treatment assimilating as much as possible to 

 that before mentioned, without which, they will 

 never flower in pei-fection. In India, three sea- 

 sons only are known ; the hot, or dry season, which 

 is succeeded by the rainy season, and the cold, or 

 winter season. In the hot season, ali, or the 

 greater part, of the plants belonging to this genus 

 produce their flowers ; in the rainy season, they 

 make their shoots ; and during the cold season, 

 they have a period of repose. The different seasons 

 being so well known, it is very easy to imitate 

 them in our hothouses, and by attending to these 

 simple rules, we should be enabled to flower the 

 species of this more abundantly than those of any 

 other orchidaceous genus, besides which, they 

 might be easily induced to flower in this country 

 at any season "of the year. D. chrysanthinn, Pie- 

 rardii, and some others, grow well when fa:jtened 

 singly on pieces of wood, and treated as is recom- 

 mended under BuTlingtonia ; but they all succeed 

 well when potted in very turfy peat, raised above 

 the pot, in the same way as is recommended in 

 potting Stanhopeas, A strong moist heat is indis- 

 pensable in the growing season, when they may be 

 frequently slightly syringed over-head. They will 

 be found to succeed best in a warmer part of the 

 house than the Stanhopeas require. They are pro- 

 pagated by detaching one or more of the stems 

 while in a dormant state, taking care not to injure 

 the roots, and potting it carefully in turfy peat 

 soil, and not much raised above the pot, which 

 I 102 ] 



Art. IV- ''^^ Flora of North America ; containing abridged Descrip- 

 tions of all the knotvn indigenous and naturalised Plants growing 

 North of Mexico ; arranged according to the Natural System. By 

 Joha Torrey and Asa Grav. Parts III. and IV. 8vo, pp.711. 

 New York, 1840. 



We noticed Parts I. and IL of this work in our preceding volume, p. 39., 



