On the banks of ponds and ditches: Pensylvania and Virginia. . July-Sept. v. v. The flowers of this genus are very inconspicuous.

2. A. hirsutissima; foliis arcte sessilibus simplicibus oblongis supra basin latescentem utrinque unidentatis, fructu tetragono infra apicem quadrispinoso. Mich. fl.

amer. 2. p. 182.

In the western parts of the Allegany mountains O
July-Sept. v. v.

3. A. hirsuta, aspera; foliis 3-lobis serratis, lobis ovali-lan-
ceolatis acuminatis, fructu infra apicem 6-spinoso.-
Willd. sp. pl. 4. p. 375.

Icon. Moris. hist. 3. s. 6. t. 1. f. 4.

On the banks of rivers and ditches: Pensylvania to Ca

rolina. . Aug. Sept. v. v.
O.

feet high.

bidentata.

trifida.

From five to eight

elatior.

4. A. foliis bipinnatifidis glabriusculis, petiolis longe ciliatis, racemis terminalibus paniculatis, caule virgato. Willd. sp. pl. 4. p. 376.

In old fields: Canada to Carolina. O. June-Aug. v.v.

5. A. foliis bipinnatifidis subtus canescentibus summis pin- artemisifolia.
natifidis, racemis terr.is terminalibus, ramis fastigiatis.
Willd. sp. pl. 4. p. 376.

In fields and waste grounds: Pensylvania to Carolina.
O. Aug. Sept. v. v.

6. A. foliis glabris bipinnatifidis summis pinnatifidis, race-
mis terminalibus solitariis, ramis fastigiatis. Willd. sp.
pl. 4. p. 376.

Icon. Pluk. alm. t. 10. f. 5.

In old fields and on road sides: Canada to Florida. O.
July-Sept. v. v.

paniculata.

7. A. foliis caulinis pinnatifidis subdentatis petiolatis, rameis heterophylla. summis lanceolatis sessilibus, petiolis longe ciliatis,

racemis terminalibus solitariis, caule paniculato.

Willd. sp. pl. 4. p. 378.

On the banks of rivers and ditches: near Philadelphia.
O. July-Sept. v.v.

667. XANTHIUM. Gen. pl. 1426.

J. X. caule inermi ramoso, foliis cordatis lobatis serratis Strumarium.... scabris basi trinervibus, fructibus ellipticis pubescenti

bus setis rigidis uncinatis.-Willd. sp. pl. 4. p. 373.

Icon. Fl. dan. 970.

On road sides, among rubbish and cultivated grounds:
New England to Pensylvania. O. Aug. Sept. v. v.
The fruit resembles the common Burdock.

carolinianus.

tomentosus.

V. SEGREGATA.

668. ELEPHANTOPUS. Gen. pl. 1347.

1. E. foliis radicalibus caulinisque oblongis basi angustatis utrinque pilosis, caule simplici erecto piloso.-Willd. sp. pl. 3. p. 2390.

E. scaber. Mich. fl. amer. 2. p. 148.

Icon. Dill. elth. t. 106. f. 126. Sloan. hist. 1. t. 156. f. 1.

In shady woods: Virginia to Florida. 2. Aug.-Oct. v. v. Flowers red.

2. E. foliis radicalibus caulinisque ovatis basi attenuatis
utrinque tomentosis, caule simplici tomentoso.-Willd.
sp. pl. 3. p. 2390.

On dry sunny hills: Lower Virginia and Carolina. 24.
Aug.-Oct. v. v. Flowers deep red.

XVIII. GYNANDRIA.

I. MONANDRIA.

* Calyculata; filamentum basi styli insertum. 669. THALIA. Cal. minimus, triphyllus. Cor. 5-petala: duo interiora minora. Anthera simplex, ovata, filamento proprio depresso innixa. Stylus simplex, ab anthera deflexus. Stigma perforatum ringens. Bacca 1-sperma.

670. CANNA. Cal. 3-phyllus. Cor. 6-partita, erecta. Nectar. bipartitum revolutum. Styl. lanceolatus, corollæ adnatus. Caps. muricata, 3-locularis, poly

sperma.

** Ecalyculatæ ; filamentum nullum; anthera apice styli inserta, biloba.

671. ORCHIS. Cor. ringens: petalo superiore fornicato. Labellum dilatatum, basi subtus calcaratum aut saccatum. Anthera terminalis, adnata.

672. NEOTTIA. Cor. ringens: petalis lateralibus exterioribus antice circa basin labelli ventricosum connexis. Anthera stylo parallela, postice inserta. 673. ARETHUSA. Cor. subringens: petalis subconniventibus. Labellum ecalcaratum. Anthera opercularis, persistens. Pollen pulvereo-granulatum.

674. EPIPACTIS. Cor. erecto-patens. Labellum ecalcaratum, planum, pendulum, apice bifidum. Anthera opercularis, persistens.

675. MÁLAXIS. Cor. patens, resupinata. Labellum concavo-patulum, adscendens. Anthera opercularis.

676. CYMBIDIUM. Cor. erecta vel patens. Labellum basi concavum, ecalcaratum, lamina patula. Anthera opercularis, decidua. Pollen globosum.

VOL. II.

677. CALYPSO.

expansa.

Cor. 6-petala: 5. sursum
Labellum sacciforme, dorso basis 2-calcaratum. Sty-
lus late alatus. Stigma operculo 2-lobo absconditum.
Pollen lamellis 4. solidis.

II. DIANDRIA.

678. CYPRIPEDIUM. Cor. 4-petala, patens. Labellum ventricoso-inflatum, obliquum. Stylus superne lobo petaloideo appendiculatus.

III. HEXANDRIA.

679. ARISTOLOCHIA. Cor. 1-petala, tubuloso-ligulata, basi ventricosa. Styl. O. Caps. infera, 6-locularis.

680. ASARUM.

IV. DODECANDRIA.

Cor. tubuloso-campanulata, 3-4-fida. Antheræ mediis filamentis adnatæ. Caps. infera, coronata, 6-locularis.

dealbata.

I. MONANDRIA.

669. THALIA. Gen. pl. 10.

1. T. panicula albido-pulverulenta, spathis bifloris, foliis ovatis apice revolutis.- Roscoe in linn. trans. 8. p. 340. Icon. In a single plate of J. Fraser.

In impenetrable swamps of South Carolina. 2. Aug. Sept. v. v. s. fl. ; v. s. c. fl. in Herb. Lambert. A tall and handsome plant; flowers small, purple. J. Millington, Esq. of South Carolina, is, to my knowledge, the first discoverer of this elegant plant. It was introduced into the English gardens by the Messrs. Frasers.

670. CANNA. Gen. pl. 1.

1. C. foliis petiolatis lanceolatis costatis, corollæ limbo in- angustifolia. teriore trifido: laciniis strictis emarginatis.-Willd. sp. pl. 1. p. 3?

C. glauca. Walt. fl. car. 59.

In deep and almost impregnable swamps of Georgia. Enslen. 4. July, Aug. v. s. in Herb. Enslen. Flowers scarlet. It approaches near to C. indica, and probably may be a new species, if not the true C. angustifolia.

2. C. foliis sessilibus lanceolatis glaucis, corollæ limbo interiore trifido: laciniis flaccidis.-Roscoe in linn. trans. 8. p. 339.

C. glauca B. flaccida. Willd. sp. pl. 1. p. 4.

C. angustifolia. Walt. fl. car. 59.

Icon. Salisb. stirp. rar. 3. t. 2. Thomps. bot. t. 1. Re-
douté liliac. 107.

In swamps of South Carolina. 2. Aug. Sept. v. v.
Flowers large, yellow.

671. ORCHIS. Swartz act. holm. 1800, p. 205.

*Radicibus testiculatis.

1. O. labello oblongo-lanceolato pinnatim ciliato petalis duplo longiore, cornu germine longiore. Willd. sp. pl. 4. p. 8.

Icon. Bot. rep. 42.

In old meadows and exsiccated swamps: Canada to Carolina. . June, July. v. v. Flowers a bright golden-yellow, very handsome.

flaccida.

tis.

ciliaris.

2. O. labello lanceolato ciliato longitudine petali supremi, blephariglotcornu germine longiore. Willd. sp. pl. 4. p. 9. Orchis testiculata floribus niveis, &c. Clayt. no. 560. In low swampy bottoms: New Jersey to Carolina. 4. June, July. v. v. Flowers clear white; resembles the preceding very much.

3. O. labello 3-partito, laciniis capillaceo-multifidis, petalis obtusis, cornu filiformi-clavato adscendente germinis longitudine. Willd. sp. pl. 4. p. 39.

In old fields, on the side of swamps: Canada to Virginia. 2. June-Aug. v. s. Flowers yellow.

4. O. labello oblongo pinnatim-ciliato, petalis rotundatis, binis lateralibus dentatis, cornu germine breviore. Willd. sp. pl. 4. p.9. Mich. fl. amer. 2. p. 156.

psycodes.

cristata.