172 CONTRIBUTIO^rS FROM THE NATIONAL HERBARIUM. 



3. MITELLA L. 



1. Mitella dipliylla L. Miterwort. 



Rich woods; above tlie fall line; infrequent. May-June. Northern states, south 



to N. C. 



4. TIABELLA L. 



1. TiareUa cordifoUa L. False miterwort. 



Rocky woods; rare; YortAYashmgion (Miss Man/ F. Miller.) May. Eastern U.S. 



5. SAXIFRAGA L. SAXIFRAGE. 



1. Saxiftaga virginiensis Michx. 



Rocky woods; frequent. Apr. Northern states, south to Ga. (Micranthes vir- 

 giniensis Small.) 



The flowers are shown in plate 30. 



74. HYDHANGEACEAE. Hydrangea Family. 



1. HYDRANGEA L. 



1. Hydrangea arborescens L. Wild hydrangea. 



Rocky woods; frequent. June. Eastern U. S. 



76. ESCALIONIACEAE. 



1. ITEA L. 

 1. Itea vii'ginica L. 

 Swamps below ihe fall line; frequent. June. Southern states, north to N. J. 



76. GEOSSULARIACEAE. Gooseberry Family. 



Plants spineless; flowers in racemes 1 . RIBES. 



Plants spiny; flowers 1-4 in an umbellate cluster 2. GROSSULARIA. 



1. RIBES L. 

 1. Ribes americaaum Mill. Wild black currant. 



Rich woods; infi'equent; BeaA'er Creek, Blagdens Mill, Brookland. Apr. Eastern 

 U.S. {R.floridum J.'B.ei:) 



The red currant of cultivation (/?. vulr/are T.am.; R. rubmm of Waid's Flora) is 

 sometimes found in the Aicinity of gardens. 



2. GROSSULARIA Mill. 



1. Grossulaiia rotundifolia (Michx.) Coville & Britton. Wild gooseberry. 



Rich woods; infrequent; Ammendale, Soldier's Home Road, Bladensburg. Apr. 

 ]\Ia&?i. to N. C. in the mountains. (Ribes rotimrUfolmm Michx.) 



A low sliiub with spines in pairs at the lia=<' of fbo leaf ,-italk?'. 



77. HAMAMELIDACEAE. Witch-hazel Family. 



Flowers with a calyx and 4 petals, in small axillary clusters, appearing in late autumn; 

 shrubs; leaves with low rounded teeth; branches not winged..!. HAMAMELIS. 

 Flowers naked, in stalked globular or conic cluster-^, appearing in spring; trees; leave.-^ 

 with long acute lobe."; branche.-t usually with thick corky \vings. 



2. LIQUIDAMBAR. 

 1. HAMAMELIS L. 



1. Hamamelis virginiana L. Witch-hazel. 



Moist or rocky woods; fi-equent above the fall line. The flowers appear in autumn 



after the leaves have fallen: the fruits remain attached for some time. Eastern U. S. 



