112 



Rhodora 



[Mat 



Repent or somewhat erect: basal leaves reduced to a single leaflet, 

 l.'i cm. long, lanceolate to ovate, coarsely serrate; petioles con- 

 spicuously elongate, 1-2.5 dm. long: cauline leaves usually consist- 

 ing of the terminal leaflet, 4-17 mm. long, suhorhicular to ovate or 

 lanceolate-elliptical, fascicled from the axils of the primary leaves 

 and rising from an ovoid to subglobose corm often 6 mm. in diameter. 

 Maine: tidal mud-flats of the Cathance River, Bowdoinham, Sep- 

 tember 14 and 19, 1916, M. L. Fernald & Bayard long, no. 14,241 

 (type in Gray Herbarium); tidal estuary of the Cathance River, 

 Bowdoinham, August 25 to 31, A'. C. Ftutett. 



Although the leaves of Stum ruaoe Walt, are frequently variable as 

 to size and shape, this form is clearly marked and different from any 

 other material to be found in the Gray Herbarium. Growing in 



Fig. 1. Stum suave, f. fasciculatum, a node showing pinnate primary 

 leaf. XJ i. 



Fig. 2. A node of same form, with primary leaf reduced to a lanec- 

 linear blade, showing a corm in the axil. X 'i- 



the soft mud of Cathance River, and covered twice a day by fresh 

 water, it sends up at the nodes clusters of half a dozen or more leaves, 

 most of which are reduced to rounded terminal leaflets. These appear 

 to be secondary leaves, and rise from the axils of the primary ones, 

 which are sometimes normal (Figure 1), or reduced to one leaflet 

 which is elongate and inconspicuous (Figure 2). In the more extreme 

 forms the secondary leaves rise from rather conspicuous hardened 

 conns, which at once suggest bulbs, but the writer could find no evi- 



