Convolvulus. XCVIII. CONVOLVULACEiE. 441 



Order XCVII. DIAPENSIACE^. 



yn<Zers^r«Js, prostrate, with crowded. heath-Iik-p Ip-iiroa o„,i r. . . 



Ca/.-Sepals 5, much imbricated, surrounded ' d base with^ll?,;"^*''/^''"?"'^' """'e"- 

 Cor.-Petal. 5 united, regular, imbricated in istivltion*^ mbr.cated scales. 



A^ii'iS^^^^S^^Z'^Sf^' '""' """''"' °" "'^ '=°™"^ '-^^■ 



Ova. 3-celIed, tree Sti/les united into 1. Stigma 3-lobed 

 J=V.-Capsule 3-vaived, foculicidal. Seed, many, smal", albuminous 



P^I"of NirVAmen^"^'" '"''"^ authors, species 2. natives of the north of Europe and the northern 



DIAPENSIA. 



Calyx 5-parted calyculate with 3 bracts at base; corolla hypocra- 



enform hmb 5 -cleft, flat ; stamens 5, from the submit of tKbe 



iSZis'^''^' '-'''-'^ '■^^^-^' n.any.seeded.-Z^, e.J^^ 



§ i . Anthers awnless. 

 1. D. Lapponica. Nm-thcni Diapensia. 



leafy bracts at its base.^ CorilS whS/^witfsfflafsTineT^^ ''^^^ ^^^ 



§ 2. Pyxidanthera. ^^z^Aers «;zYA Z/ie lower valves beaked 



m^V RrT'j.^''^-K^^!- (Py-\idanthera barbulata. Mlchx. P. cuneifolia 

 i^A.)— Branches short, ascendins-; ^w. lance-cuneifhrm ar^nta ^vT^ 1 

 at base ; Jls terminal, sessile ; lo^er .S/W «/^a/«X beS 'o^neStTase 

 —A prostrate, creeping plant, abundant in pine barrens N T tn pJ!- rf • 

 dense beds. It has also been found by Dr. Peck oTthe Whii St? /^r/"^'^'"! 

 Stems 3--6' long, subhispid. Leayes^-2'' by i-F' Sower^^L 

 Sepals denticulate, as long as the corolla tube. May jT-The beak ol^t^^ 

 anther appears to be quite variable, sometimes reduced^to ^ acute poLt 



Order XCVIII. CONVOL¥ULACE^._Bindweeds 



Co/.-Sepals 5, much imbricated, usually united at base, pe sistent ^' 

 Cor. regular Imb 5- obed or entire, plaited and twisted m istiva ion 



Fr. -Capsule 2-4-celled, valves with septil>agal dehiscence 



S*. few, Vge, with thin mucilaginous albimien. Co?yM<for« foliaceous. orwanting 

 Genera 43, species 660, very abundant in tropical climates, rare in cold 



is fhTprodfct-;T;'hV?ot ofElVoui'Z'p'^fil^F'Aitcl Z^kZtf.Z''' '""r**^«- •^'^^'^? of the shop. 

 Scammonia, native of Levant. The drL^uf m aJit^s ot' hnfh Iw. ^f '"^'- f.^a>nmonv of ConvolvulG. 

 resin. The«.e.r,orcr., a valuable^SySfttt p^r^-'dutt";^^^^^^ 

 Conspectus of ike Genera. 



_, ^ , SStamens included. ^it^L1'^?'|- : " ' ' gSL"'"*- 5 



, , „ S Calyx naked. \ Stamens e.xserted CoroUa scar pt * ' ^'2/"WMr 3 



B, . 5 eafy, green. ? Calyx enclosed in two large, leaf like bfacte " ' ■' %^f"^oclit. 2 



Plants < leafless, parasitic, orange-colored sc, icai luve oracts Calystegia. 4 



Cnscuta. s 



Suborder 1.— C ONVOIjVUL,E^. 



Embryo with cotyledons. Carpels united. Fruit capsular, dehiscent, 



1. CONVOLVULUS. 



Lat. convolvere, to entwine ; &om the habit of most of the plants 



Calyx 5-parted, naked or with 2 small bracts near the base • cor 

 campanulate, or funnel-form, limb S-jlaited; sta. shorter than the 

 limb, rarely a little longer; ova. 2— 4-celled, cells 1— 2-ovuled- sty 



