TETTIANDRIA. DIGYNIA. 107 



covered by the connivent calix, 1 of them some- 

 times abortive. (Stamina 1, "2, and 4.) 



Small herbs with trifid or hiternateU" cUvided leaves, 

 sheathing- at their base; flowers sessile, in axillary clus- 

 ters, or terminal and dichotomously c<)r\mbOiie. In Ji. or- 

 biculata the leaves are round and lobed. 



Species. 1. ^9. anensis. In llie fields of Virginia, 

 Clayton. (I ;troduged?) 



Besides tiie preceding- European species there are 3 

 others indigenous to the alpine mountains of Peru. 



160. HAMAMELIS. L. (Witch-hazel.) 



Calix 4-( left, ])ei sistent. with 3 bra( tes. Pe- 

 tals 4, long and linear, ^^ ith a short dilated fila- 

 nient at the base of each. Filaments and anthers 

 united: anthers 2 celled, ea( h cell haxing a ver- 

 tical valve. Capsule coriaceous, (nut) 2-celled, 

 2-lf)hed, 2-awin'd, apex 2 valvtd, valves cleft. 

 Seeds 2, arillate. 



A small tr-^e with the habit of ,/}Imf.<t; leaves alternate, 

 stipulate, oblique at the base; flowers sessue, by threes, 

 in axillarv or laitial pedunculate clusters; cahx pubescent, 

 loliaceous, and pt-rsisent; petals lig'ulaie, alternating with 

 the stamina; capsule indurated, half inclosed in tlie base, 

 of the per&istent calix, bursting tkstically; seeds arillate, 

 black and shining; corculum flat, inclos-^d in a carnfious 

 perisperm, radicle de-cendant, opposite to the hilum. 



Species. 1. H virginica. From Canada to Florida. 

 ^. macrophyllu. leaves suborbicnlate cordate, with elevat- 

 ed scabioiis .-^potsonthe under Side — In Georgia, Phrsh. 

 Catabaw mountains, (North Carolina) j\\ y. * pai^-ifoliaj 

 leaves smaller, oblong obovate, upper pan undulately atid 

 grossly crenate, the under side pubescf nt, s ))t.ewhat hir- 

 sute; segments of the calix oblong, stamens and perigv- 

 nous filame'ts often nearly equal. — A shrub eveijway 

 smaller than ihe common H vrg-ijiica. with the branches 

 neai-U erect, calix somewhat c:)loured and dia])hanous, 

 pe.als bi-i.chi yellow. From the mountains of Fensylva- 

 nia, i>. T' in Hort. Landretn, Philadelphia. 



Tt efio\\ers of the Hamcmehs, like those of the Natural 

 Order ^imciilacex, 'o wbicli it is souiewliut allied, appear 

 cither in the winter or very earlv in the spi in;:, and in 

 som.e^ of the varieties thev are odorous. Tr-t under side 

 of the leaves, and more sparingly tue upper, as in Father' 



