222 WILLIS : PODOSTBMACEÆ 
D. longifolîa. Tulasne accepts these with hesitation, and 
Weddell, followed by Hooker, places them all under D. 
dichotoma as varieties. Without much further study, I am 
not prepared to admit even the varietal rank of these forms. 
The thallus varies much in stoutness and width, and in the 
degree of zigzagness, characters on which a good deal is 
based in the separation of the species mentioned. The 
form Wightii is mainly characterized by the apparently 
greater number and length of the bracts, but this depends 
merely on the specimens having been taken before the 
fall of the tips. The form longifolia is separated from 
dichotoma mainly on length of the leaves, a very variable 
character in most of the order. The species is figured by 
Tulasne, Monogr., t. IX. 
DIGBÆA MINOR, Wedd.in DC. Prodr., XVII., 1873, p 
71 ; Podostemon minor, Benth, and Hk. /. ; Hooker in FI. Br. 
Ind. 
Thallus insufficiently known, apparently creeping, 
branched, ribbon-like, to 10 mm. wide and to 5 cm. long. 
Secondary shoots when floriferous sessile by broad base on 
thallus margins ; bracts helmet-shaped. Fruiting pedicel 
very short, usually under 3 mm. 
Thallus (c/*. Griffith’s rough sketch in Hb. Kew) stellately branched, 
algiform, ribbon-like, creeping, to 5 cm, long from centre and 3-10 
mm. wide, hapterous at various points on the lower side. Secondary 
shoots marginal as in other species, some (all ?) ultimately floriferous. 
Bracts 2-5, more or less helmet-shaped, keeled, like those of D. 
Wallichii, or occasionally (?) like those of D. elongata, imbricate. 
Spathe very short, funnel-shaped. Pedicel of flower about 1 mm., 
lengthening to about H-4 mm. in fruit. Capsule 8-ribbed. 
Assam, in the Khasia Mountains, 
Borpani river, north of Nartiang, near Madan, Griffith, 
No. 2,437, ex. Hb. E. Ind. Co.; Khri river, below Nongkhlaw, 
Hooker (spirit material in Kew Museum, det. Weddell, fide 
Oliver). 
This species is very imperfectly known, and may be only 
a phase of D. Wallichii. Griffith’s specimens in the Kew 
