their ramification, their characters require much to be explained. H. dejlexa differt: caule vegetiori, stric-
tiori, magis virente, alato nec'angulato; ramis aut abbreviatis aut elongatis strictis, nec laxis patulis apice
cernuis; foliis majoribus, plerumque latioribus, imis confertis obovatis longe petiolatis lsete virentibus, nec
ellipticis parvulis, sub anthesi jam emarcidis; calcaribus corolla duplo brevioribus curvo-descendentibus,
demum curvo-subascendentibus crassiusculis, nec corollam sequantibus stricte patentibus dentibuspue pili-
formibus.
Tab. CLV.—Fig. 1, Flower; y ^.2 , Stamen; ,/fy. 8, Pistil 4, Capsule; 5, Section ofdo.;Jig. 6,
Seed; Jig. 7, Section of do.; fig. 8, Embryo:—magnified.
2. H. Brentoniana (Griseb.): caule bumili erectiusculo diffuse ramose, foliis 3-5-nerviis
elliptico-oblongis acuminatissimis in petiolum attenuatis, summis subsessilibus oblongo-
lanceolatis, cyma terminali umbellseformi 3-flora, flore centrali longius pedicellato, calcaribus
crassiusculis obtusis curvo-descendentibus 1. subhorizontalibus corolla brevioribus.
(T ab. CLVI. A.)
Radix curvo-descendens, annua. Caulis triuncialis, obsolete tetrapterus, glaber, siccus obscure cseruleo-
viridescens. Rami erecto-patentes, cauli similes. Intemodia inferiora brevissima, superiora 4-6-8"' longa.
Folia patentissima 1-1£"' longa, 4-8"' lata, glabra, subintequalia, ima longius petiolata, sp|thulato-oblonga,
acuta, media elliptico-oblonga, acutissima, subsessilia, floralia minora. Pedicelli breviusculi, verticillastris
accedentibus cum cyma terminali et cum inflorescentia ramorum confluentibus. Sepala 4 oblongo-lanceo-
lata, acutissima, corollam dimidiam sequantia. Corolla campanulata-cylindrica, (5"' alta et lata,) lobis
ovato-triangularibus acutis erectis tubum sequantibus. Calcara corolla fere duplo breviora. Anthera
flavse, parvulse, nutantes. Ovarium ovato-oblongum acutum, stylo nullo, stigmatibus vix distinguendis.
Hab. Newfoundland. Miss Brenton, Dr. Morrison.
Tab. CLVI. A.—Fig. PL Flower:.— magnified
3. H. heterantha (Griseb.); caule humili erectiusculo ramoso, foliis 5-nerviis, imisspathu-
latis petiolatis, superioribus ovato-subrotundis subsessilibus apice rotundatis apiculatis,
floribus confertis, calcare tenui corolla triplo breviori, floribus inferioribus ecalcaratis.
(Tab. CLVI. B.)
Radix curvo-deseendens, annua. Caulis 4-uncialis, in ramos aequales plerosque oppositos divisus, as-
cendenti-erectus,.glaber, teretiusculus 1. alis binis ex foliis decnrrentibus tenuibus fere anceps. Internodia
insequalia, ima 4'" longa, media uncialia, suprema semiuncialia. - Folia- ad lentem serrulata, sequalia, (8
longa, 8!" lata,) sed inferiora longius petiolata, obtusiora. Cyma terminalis umbellseformis 5-flora, pedi-
cellis inaequalibus 1-4 linearibus, cui accedunt verticillastra 2-6-flora. Sepala 4 ovato-oblonga, acuminata,
juniora recurvata, corollam dimidiam sequantia. Corolla ochroleuca, breviter campanulata, lobis ovato-
triangularibus acutis erectis 2-3"' longis tubum rotundatum sequantibus; calcar oblique descendens rectius*
culum; Jlores ecalcarati minores. Antheree globulosse parvulse, filamenti latitudinem subsequantes. Ova-
'rium ovale, stigmatibus sessilibus erectis brevibus connatis. Capsula corollam mareescentem fere duplo
excedens, elliptico-oblonga.. Semina magna, albida, globosa, lsevissima, (suturse affixa.| .
H ab. Newfoundland. Miss Brenton.— This is a most remarkable species, on account of the absence of
the calcara in the lower flowers, which are also much smaller, at the same time that the branches are more
slender, on the top of which these flowers are crowded. This abortion, however, affords no reason to
doubt of the constancy of the generic characters of Ralenia,since the genus is as well limited by the struc-
ure of its ovarium and by the insertion of its seeds, as by its spurs; also, the form of the corolla itself is
constantly different from Swertia.
Tab. CLVI. B.—Fig. 1, Flower:—magnified.
Tribus II. Erythracace.®.—Inflorescentia dichotoma, caule perflorem alarem dichotomies
terminato. Sepala suhlibera. Antheree seepe spirales, rima loculorum sursum dehiscente
(Chironieis rima loculorum deorsum dehiscens, hinc abbreviata, plerumque utriusque loculi
contigua.) Stylus distinctusdeciduus (:raro 0), stigmate variabili. Capsula unilocular is
l. marginibus introflexis semibilocularis, placentis suturalibus, l. placenta centrali bilocularis.
__Corolla rubra, alba, l.flava, eglandulosa, infundibuliformis, demum supra capsulam torta,
l. decidua. Herbie plereeque annuce, per totum terrarum orbem disperses, in temperatis aus-
tralioribus utriusque hemispheeree frequentiores.
6. CICENDIA. Adans.
Corolla regularis, 4-fida. Antheree immutatae. Stigma indivisura. Capsula unilocu-
laris 1. semibilocularis.
1. C. exaltata (Griseb.); caule ascendente, stricte ramoso, foliis lanceolato-linearibus,
corollas tubo gracili lobos oblongos obtusos aequante, stylo nullo, capsula semibiloculari.
(Tab. CLVII. A.)
Radix annua. Caulis spithameus, glaber, obsolete tetragonus 1. alis duabus tenuissime fere anceps,
gracilis, basi ascendens, stricte dichotome ramosus. Intemodia 1-2 uncialia. Inflorescentia quater dichotoma,
pedicellis alaribus nudis internodia subasquantibus. Folia caulina lauceolato-lineana, acuminata, in-
ternodiis duplo breviora, superiora minora, omnia nervosa, basi 1-1 lata, nervo medio subtus conspicuo
decurrente. Folia 2 floralia sub quavis ramificatione cymas, pedicellis ebracteatis. Corolla infundibuliformis,
tubo curvo gracili. ' Calyx corollse tubo subbrevior, lobis ovato-oblongis acutis ineequalibus tubum
subsequantibus. Filamenta brevia, tubo supra medium inserts, antheris. oblongis erectis, loculis connecti-
vum sequantibus demum patentibus crispatis (nec spiraliter tortis.) Ovarium ovato-oblongum, obtusum,
stigmate vix distinguendo. Capsula oblongo-linearis, calyce duplo longior, badia, inferne corollse emarcidse
vestigiis vestita. Semina minutissima, rotunda, badia.
H ab. Near mountain springs and streams, not uncommon between the Kettle Falls, “ and Narrows”
of the Columbia River, N.W.C. Douglas.—It differs somewhat from the genus, and even from the tribe,
by the absence of any style: but, besides the characters taken from the flower, the iErythracacece are so
well marked by their inflorescence, that I am of opinion the present would be the most convenient
place for this species. I have seen only one specimen, which was already in a very advanced state. Ex-
acum pulchellum, Pursh, which I have not yet obtained, may be another North American species of this
genus, with which Orthostemon, Br., may perhaps be not improperly joined, as it seems to differ only by
its stigma, the characters of which are at least variable in Erythrcea and Canscora.
Tab. CLVII. A.—Cicendia exalata.
Tribus III. Chlore^b.— Inflorescentia dichotoma. Corolla eglandulosa, rotata, demum
circa capsulam marcescens. Anther arum loculi distincti. Stylus. distinctus, deciduus, stigmate
variabili. Capsula unilocularis l. semibilocularis.—Herbee plereeque annuce, Europee
et Americee incolee, Europearum floribus plerumque flavis, Americanarum seepius roseis.
7. SABBATIA. Adans.
Flos 5 (-12)-merus. Antheree erectse, demum recurvse. Stigmata bicruria, demum
spiraliter torta. Capsula unilocularis, valvulis parum introflexis.
1. S. gracilis (Salisb.); caule teretiusculo effuse paniculato,. ramis alternis, foliis lineari