TRIANDRIA. 



(7) 



TETRANDRIA. 



corolla shorter than the calix, one-valved, awnless ; stigma 

 almost sessile, rather hirsute. 



CALAMAGROSTIS, Read Bent Grass Calix two-valved, one- 

 flowered ; valves acute or acuminate; corolla two-valved, 

 mostly shorter than the calix, surrounded with a pubes- 

 cence at the base, the dorsal valve with or without an 

 awn. 



CRTPSIS, Thorn Grass Calix two-valved, oblong, one- 

 flowered ; corolla two-valved, longer than the calix ; 

 stamens two or three. 



POLYPOGON Calix two-valved, one-flowered ; each of the 

 valves awned ; corolla two-valved, shorter than the calix, 

 the exterior valve terminating in an awn. 



ORTHOPOGON Calix one-flowered, with three nearly equal 

 valves, all awned, the awn of the exterior valve much 

 longer than the others ; awns straight and smooth. 



DIGITARIA, Crab Gross Calix two or three valved, con- 

 cave ; exterior valve minute, or none, second variable, the 

 innermost as long as the corolla; corolla two-valved, 

 oblong-ovate, awnless ; style very long ; nectary cleft. 



CYNODO^, Bermuda Grass Calix two-valved, spreading, 

 lanceolate ; corolla larger than the calix, two-valved ; the 

 exterior valve large and ovoid ; nectary truncate. 



TRISETUM, Three-awned Oat Grass Calix two to three 

 flowered, acuminate and carinate ; corolla, outer valve 

 terminated by two shorter almost tooth-like awns, and one 

 longer straight dorsal awn, not contorted. 



URALEPSIS Calix scariose, two-valved, two or three 

 flowered ; flowers alternate, distinct ; corolla two-valved, 

 very unequal ; seed somewhat gibbous, enlarged above, 

 ariflated. 



SORGHUM, Broom Grass Calix two-valved; corolla three- 

 valved, the second one awned, the third connecting with 

 the villose nectary ; corolla of the male flower awnless ; 

 seed large. The flowers are polygamous, by pairs ; the 

 hermaphrodite sessile, the neuter pedicellate. 



SESLERIA, Moor Grass Calix two to five flowered ; corolla 

 two-valved, valves toothed at the point ; stigma somewhat 

 glandulous. 



WINDSORIA Calix carinate, many-flowered, two-valved; 

 spikelets thick; styles slender, with simply pectinated 

 stigmas ; seed calciform, corrugate, impressed with a flat, 

 central, oval pilum near its base. 



DAHTHONIA Calix two-valved, many-flowered, very large, 

 equal or exceeding the included spikelet; exterior valve of 

 the corolla concave, with the points emarginate, mucro- 

 nate, awned, or unarmed, and then trifid. 



KOJLEHIA Calix irregularly two or three flowered, two- 

 valved ; corolla acuminately oblong, two-valved, shortly 

 awned, longer than the calix ; glumes nervose. 



EI.EUSINE Flowers awnless, disposed on one side of the 

 receptacle; calix carinate, many-flowered; corolla two- 

 valved, awnless. 



OXYDENIA Common calix two-valved, subulately acumi- 

 nate; corolla two-valved, minute, deciduous ; valves ob- 

 tuse, with or without a terminating awn ; seed roundish, 

 naked, smooth, and somewhat gibbous. 



CIILORIS Calix two-valved, two to four flowered, valves 

 carinate, with or without an awn. 



MONOCEIIA Calix two-valved, rigid, fixed, many-flowered ; 

 valves unequal ; flowers within the common calix three to 

 four neuter, and one hermaphrodite. 



MANISAUIS Flowers polygamous, spiked. Hermaphrodite 

 calix one-flowered, two-valved, valves unequal ; corolla 

 two-valved, smaller, included by the calix; masculine 

 and neutral calix uniform or regular. 



TRIGYNIA (Three Styles.) 



ERIOCAULON Calix, common of many leaves, many- 

 flowered ; perianth superior, of two or three leaves. Male 

 flowers central ; corolla of one petal, cloven. Female 

 flowers in the margin; corolla of two petals; stigmas two 

 or three; capsule of two or three cells; seeds solitary. 



MONTIA, Water Chickweed Calix two-leaved; corolla one- 

 petalled, irregular; capsule one-celled, two-valved. 



PROSERPINACA Calix three-parted, superior; corolla none ; 

 drupe with a three-celled nut. 



HOLOSTEUM Calix five-leaved; petals five, eroded, or 

 biparted ; capsule one-celled, subcylindric, bursting at 

 the summit. 



POLYCARPON, All-seed Calix five-leaved ; petals five, ovate, 

 very small ; capsule one-celled, three-valved ; seeds very 

 many. 



MOLLUGO, African Chickweed Calix five-leaved ; corolla 

 none ; capsule three-celled, three-valved. 



MINUARTIA Calix five-leaved; corolla none; capsule one- 

 celled, three-valved ; seeds few. 



DONATIA Calix three-leaved; petals nine, twice as long as 

 the calix, linear-oblong ; anther subglobular, twin. 



QUERIA Calix five-leaved; corolla none; capsule one- 

 celled; seed one. 



LECHEA Calix three-leaved; petals three, linear; capsule 

 three-celled, three-valved,- with as many internal ones; 

 seeds solitary. 



KoiNiGiA Calix three-leaved; corolla none; seed one, 

 ovate, naked. 



TRIPLARIS Calix very large, three-parted, or six-parted ; 

 corolla three-petalled, or none; nut three-sided, within 

 the ovate base of the calix. 



CLASS IV. TETRANDRIA. 



Consisting of such Plants as have Hermaphrodite Flowers, 

 furnished with four Stamens. 



1. MONOGYNIA (One Pistil.) 



1. Such as have aggregate Flowers, with the seeds single and 



naked. 

 PIIOTEA, Silver Tree Corolla four-cleft, or four-petalled ; 



anthers linear, inserted with the petals below the tip; 



calix proper none; nut one-seeded, superior. 

 CEPHALANTHUS, Button Wood Calix, common none, pro- 

 per superior, funnel-form ; receptacle globular, naked ; 



seed one, lanuginous. 



GLOBULARIA, Blue Daisy Calix, common imbricate, pro- 

 per tubular, inferior; corollets of the tipper lip two-parted, 



lower three-parted ; receptacle chaffy. 

 DIPSACUS, Teazel Calix, common many-leaved, proper 



superior; receptacle chaffy. 

 KKANTIA Calix, common oblong, simple, five to ten 



flowered; proper simple, superior; corollets irregular; 



receptacle naked. 

 SCABIOSA, Scabious Calix, common many-leaved, proper 



double, superior; receptacle chaffy, or naked; seed coated 



and crowned by the partial calix. 

 ALLIONIA Calix, common oblong, simple, three-flowered ; 



proper obsolete, superior; corollules irregular; receptacle 



naked. 



