63 



CLASS XIX. ORDER IV. 



Ensle'nia. Calyx small, 5-parted, per- 

 manent ; corolla 5-parted ; segments con- 

 verging, erect; nectary 5-parled, petal-like, 

 divided almost to the ba.se ; pegmeiits trun- 

 cate, flat, each tenninated by 2 central lila- 

 ments ; each etamen v\-ith a pair of pendu- 

 lous, cylindric masses of pollen, suspended 

 from the top of the conic stigma; follicles 

 in pairs, small. 



ORDER VI. HEXAiVDRIA. 



Aristolo'chia. Calyx 0; corolla supe- 

 rior, 1-petalled, Hgulate, inflated at the ba.se; 

 capsule 6-celled, many seeded, (birthwort.) 



ORDER XII. POLYANDRIA. 



As"arum. Calyx sub-campanulate, 3 to 

 4 cleft ; corolla ; 'anthers adnate to the mid- 

 dle of the filaments; cap.sule inferior, 5- 

 celled, crowned wath the calyx, (wild gin- 

 ger.) 



CLASS XIX. MONCECIA. 



ORDER 1. MONANDRIA. 



Zos"tera. Stamens and pistils inserted 

 in 2 rows upon one side of a spadix ; spatha 

 foliaceous. Staminate flowers with the an- 

 thers ovate, sessile, alternating with the 

 germs. Pistillate flowers with the germ 

 ovate ; style 2-cleft ; drupe with 1 seed, 

 (gi-ass-wrack.) 



Caulin^ia. Staminate flowers : calyx 0; 

 corolla , anthers sessile. Pistillate flovv- 

 ers : calyx and corolla wanting ; style lili- 

 form; stigma 2-cleft; capsule 1-seeded; 

 flowers axillaiy. (river-nymph.) 



Zannichei/'lia. Staminate flowers : ca- 

 lyx and corolla wanting. Pistillate flowers: 

 perianth single, of 1 leaf; ovaries 4 or more ; 

 Btyle 1 ; stigma peltate ; capsule sessile. 



Cha^ra. Stammate flowers : calyx ; co- 

 rolla ; anthers globose, sessile. Pistillate 

 flowers : calyx ; corolla ; style ; stig- 

 mas 5 ; ben-y 1-celled, many-seeded, (cha- 

 ra.) <S. 



Na'jas. Staminate flowers : calyx cylin- 

 dric, 2-cleft ; stamen filamentous, long ; an- 

 ther 4-valved, valves spreading. Pistillate 

 flowers : calyx ; style with 2 stigmas ; 

 nut 4 -.seeded. 



Euphor'^eia. Rarely a perianth; invo- 

 lucre monophyllous, campanulate, 8 to 10- 

 toothed, the inner segments membranaceous. 

 Staminate flowers 12 or more ; calyx and 

 corolla generally wanting. Pistillate flow- 

 era : solitary, centi'al, stipitate ; calyx and 

 corolla ; capsule 3-lobed. (spurge.) 



ORDER ir. DIANDRIA. 



Lem"na. Staminate flowers : perianth of 

 1 leaf; stamens on the base of the germ. 

 Pistillate flowers: perianth of 1 leaf; stig- 

 ma funnel-foi-m ; capsule 1-celled, from 1 to 

 5-seeded. (duck's meat.) 



Podos"temum. Stammate flowers: ca- 

 Ijx ; corolla ; stamens affixed to a pedi- 

 cel. Pistillate flowers : calyx ; corolla ; 

 genn ovate ; stigma 1, sessile ; ca^jsule 2- 

 celled, 2-valved, many-seeded ; seeds mi- 

 nute, (tlu-ead-foot.) 



order III. TRIANDRIA. 



Tv'PHA. Ament cylindric, den.sc ilower- 



ed. Staminate flowers : calyx obsoiete, S- 

 leaved ; corolla ; stamens 3 together, on 

 a chally or hairy receptacle, united below 

 into 1. " Pistillate flowers : below the stam- 

 inate ; calyx ; corolla ; seed 1, pedicel- 

 led ; the pedicels surrounded at the base 

 with long hairs resembling egret, (cat- 

 tail, or reed mace.) 



SrARGA'Niuar. Ament globose. Stami- 

 nate flowers : cidyx 3-sepalled ; corolla 0. 

 Pistillate flowers: calyx 3-sepallcd; co- 

 rolla ; stigma 2-cleft ; drupe juiceless, 1 

 or 2-seeded. (burr- reed.) 



Scle'ria. Staminate flowers: glume 2 

 or 6-valved, many-flowered ; paleas awn- 

 less. Pistillate flowers ; calyx 2 or 6-valv- 

 ed. 1-flowered ; paleas none ; stigmas 1 to 

 3 ; not colored, sub-globose, (whip-grass.) 



Ca'eex. Aments imbricate, usuafly in cy- 

 lindric spikes. Staminate flowers: calyx- 

 scales single ; corolla 0. Pistillate flowers : 

 calyx-scales sino^le : corolla inflated, mono- 

 petalous, 2-tootned at the apex ; stigmas 2 

 or 3 ; nut 3-sided, enclosed in the inflated, 

 permanent corolla, which becomes an 

 utriculus-like permanent aril ; sometimes 

 dioecious, (sedge.) 



Trip"sacum. Staminate flowers : glume 

 2-flowered, outer one staminate, inner one 

 neutral ; corolla a membranaceous glume. 

 Fertile flowers : glume 1 or 2-flowered. 

 sun-ounded by a 1-leafed involucrum perfo- 

 rated near the base ; paleas with numerous 

 thin membranaceous valves ; styles 2 ; seed 

 1. (sesame grass.) 



Compto'nia. Staminate flowers : ament 

 cylindric, with calj^x-scales 1-flow^ered ; co- 

 rolla 2-petalled or none ; filaments 2-forked. 

 Pistillate flowers : spike or ament ovate ; 

 corolla 6-petalled (the corolla may be called 

 a calyx) ; styles 2; nut oval, 1-ceUed. (sweet- 

 fern.) 



Co'ix. Staminate flowers : in remote 

 spikes ; calyx-glume 2-flowered, awnless , 

 corolla-glume avniless. Pistillate flowers : 

 calvx-glume 2-flowered ; corolla-glume 

 awmlcss ; style 2-parted ; seed covered with 

 the bone-like calyx. (Job's tear.) Ex. 



Ze'a. Staminate flowers : calyx-glume 2- 

 flowered, a\s"nless ; corolla-glume a-wnless. 

 Pistillate flowers : calyx-glume 2-valved 

 (number of valves mcreased by cultivation) ; 

 style 1, veiy long, filiform, pendulous; seed 

 solitaiy, immersed in an oblong receptacle. 

 (Indian corn.) S. 



Tra'gia. Staminate flowers : calyx 3- 

 parted ; corolla none. PistiUate flowers : 

 calyx 5-parted ; corolla none ; style 3-cleft ; 

 capsule tricoccus,3-celled; seed solitaiy. S. 

 [Grasses found in class 3d vary into tliis or- 

 der.] 



ORDER IV. TETRANDRIA. TO ORDER VI. 

 HEXANDRIA. 



At/'.vus. Staminate flowers : ament com- 

 po.sed of wedge-foi-m, tnmcate, 3-flowercd 

 receptacles ; caljrx a scale, 3-lobed ; corolla 

 4-parted. Pistillate flowers : calyx 2-flow- 

 ered scales, somewhat 3-cleft ; corolla 

 seed compressed, ovate, wingless, (alih r j 



Eriocau'lon. Involucre many-leaved 



