CLASS V. ORDER II, 41 



P. Flowers incomplete. 



Hamilto'nia. Polygamous ; perianth turbinate, c- .npauulate, 5-cleft ; corolla 0; 

 nectary with the disk 5-toothed ; style 1 ; stigmas 2 or 3, germ immersed in the 

 nectary ; drupe 1-seeded, enclosed in the adhering base of the calyx, (oil nut.) 



The'sium. Perianth 4 or 5-cleft; stamens 4 or 5, villous externally; nut 1- 

 seeded, covered by the persistent perianth, (false-toad flax.) 



Glaox. Calyx campanulate, 5-lobed, coloured ; capsule globose, 5-valved, 5- 

 seeded, surrounded by the calyx. 



ORDER 11. DIGYNIA. 



A. Corolla l-petallcd, inferior. 



Gentia'na. Calyx 4 or 5-cleft ; corolla with a tubular base, bell-form, without 

 pores, 4 or 5-cleft; stigmas 2, sub-sessile; capsule I-celled, oblong; columellas 

 2, longitudinal ; stamens but 4, when the divisions of corolla are 4. (gentian.) 



Cuscu"ta. Calyx 4 or 5-cleft; corolla 4 or 5-cleft, sub-campanulate, wither- 

 ing; capsule 2-celled, dividing transversely at the base ; seeds binate. (dodder.) 



Gelsemi'num. Calyx small, 5-leaved ; corolla funnel-form; border spreading, 

 5-lobed, nearly equal ; capsule 2-celled ; seeds flat. 



Hydro'lea. Calyx 5-petalled ; corolla wheel-form, or be}l-form ; anthers cor- 

 date ; style long, diverging ; stigma peltate ; capsule 2-celled. iS. 



Dichon"dra. Calyx 5-parted, with spatulate segments ; corolla short, bell- 

 form, 5-parted ; stigma peltate, capitate ; capsule compressed, 2-celled, 4-seed- 

 ed. S. 



Evol"vulus. Calyx .5-parted ; corolla bell-form ; styles 2, 2-cleft ; stigma 

 simple. 



Swer"tia. Corolla rotate, with 2 pores at the base of each segment. 



B. Corolla b-petalled. 



Pa'nax. Polygamous, umbelled, involucrum, many-leaved; Calyx 5-toothed, 

 in the perfect flower, superior ; berry cordate, 2 or 3-seeded; Calyx in the sta- 

 ininate flower entire, (ginseng.) 



Heuche'ra. Calyx inferior, 5-cleft; corolla on the calyx; petals small; cap- 

 sule 2-beaked, 2-celled, many-seeded, (alum-root.) 



C. Corolla loanting. 



Salso'la. Perianth inferior, 5-cleft, persistent, enveloping the fruit with its 

 base, and crowning it with its broad scarious limb, (salt wort.) 



Atri'plex. Polygamous; calyx 5-leaved, 5-parted, inferior; style 2-parted ; 

 seed 1 ; in the pistilate flowers the calyx is 2-parted. (orach.) 



Plane'ra. Calyx membranous, bell-form, 4 to 5-cleft; corolla ; stigmas 2; 

 capsule globose, membranous, I-celled, 1-seeded; stamens4to6; polygamous. S. 



Ko'cHiA. Calyx inferior, bell-form, 5-cleft, forming a permanent band around 

 the fruit, somewhat resembling 5 petals ; corolla 0; style short; stigmas 2 or 3, 

 long, simple. S. 



Cel'tis. Perfect or polygamous ; perianth inferior, 5-lobed ; drupe globose, 

 1-seeded. (nettle-tree.) 



Chenopo'dium. Calyx 5-parted, obtusely 5-angled, inferior ; style deeply cleft: 

 seed 1, lens-like, horizontal, invested by the calyx, (pig-weed, oak of Jerusalem.) 



Ulm"us. Calyx bell-form, withering; border 4 or 5-cleft; seed 1, enclosed in 

 a flat membranaceous samara ; stamens vary from 4 to 8. (elm.) 



Beta. Calyx 5-leaved ; seed kidney-form within the fleshy substance of the 

 base of the calyx, (beet.) Ex. 



[Plants umLelliferous ; flowers 5-petalled, superior ; seeds 2.] 



Eryn"gium. Fruit ovate, with bristles; petals oblong, equal, inflected; flow- 

 ers aggregate, forming a head. 



Sanic^ula. Seeds with hooked prickles, oblong, solid ; umbels near^ simple, 

 capitate; flowers polygamous; involucre few-flowered; calyx 3-parted, peis 

 manent. 



Dau'cus. Seeds striate on their joining sides; outer sides convex, having 

 hispid ribs ; involucrum pinnatifid ; flowers sub-radiate, abortive in the disk, 

 (carrot.) 



Urasfer'mum. [Osmorhiza.]* Seeds sub-linear, solid, acute-angled, not stri- 



• Where two or more generic names are given, the pupil will understand that those within 

 the brackets are synonymesof the other name. 



