SUPPLEMENT. 127 



small, pyriform spores. Specimens in fruit commuuicated by Mr. S. Askmead fruui 

 Key West. (v. s.) 



Page 61, 



3. Dasya ramosissima, Harv. 



Add to description : Conceptadcs sessile on the lesser branches, ovato-globose, thin 

 walled, inflated, without prominent orifice, containing a large nucleus. Stichidia on 

 the ramelli, either fusiform or ovato-acuminate, always tapering to a slender point ; 

 tetraspores in a single or double row. Specimens in both kinds of fruit communicated 

 by Mr. S. Ashntead from Key West. (v. s.) 



Page 62, add, 



3.* Dasya Harveyi, Ashmead ; rose red ; stem cartilagineo-membranaceous, longi- 

 tudinally striate, glabrous, inarticulate, robust, attenuated upwards, much branched ; 

 branches alternate or secund, once or twice decompound, their ultimate divisions being 

 pinnated with capillary, closely set, articulated (polysiphonous) ramuli, which are 

 densely clothed with byssoid, dichotomous ramelli ; cells of the epidermis of the brandies 

 very narrow, parallel ; articulations of the ramelli many times longer than broad , 

 conceptacles sessile near the tips of the lesser ramvili, urceolate, with a prominent orifice ; 

 stichidia on the ramelli, tapering to each end. (Tab. L. A.) 



Hab. Key West, Mr. Ashmead. (v. s. in Herb. T.C.D.) 



Frond 8 — 10 inches long, as thick as crow-quill in the main divisions ; very much 

 branched, the successive divisions being more and more slender, till the ultimate ones 

 have become finer than human hair. The bi'anching is irregular, the larger divisions 

 frequently secund, several lateral branches directed successively first to one side and 

 then to the opposite one of the main branch. All the main branches and their lesser 

 divisions down to the last are inarticulate, being coated with very slender, coloured, 

 longitudinal, parallel, seriated cells, which give the liranches a striated appearance under 

 the microscope ; they are also glabrous, or bare of ramelli. The idtimate branchlets, 

 which are half an inch to an inch long, are plumose, very flaccid and soft, and closely 

 set with lateral, but not strictly distichous pinnules, which are clothed with excessively 

 slender, cobweb-like, flaccid ramelli. These latter are many times dichotomous and 

 taper to the points ; their articulations are many times longer than broad. The concep- 

 tacles are nearly of the form of those of Polysiphonia urceolata, and are sessile at or 

 near the ends of the pinnules of the plumose branchlets. The stichidia spring from tlie 

 lower forkings of the byssoid ramelli, and are much attenuated, tapering at each end, 

 and containing a double row of tetraspores. The whole plant is of a beautiful, clear, 

 rose-red colour. Its substance is very soft and flaccid, and in drying it adheres very 

 strongly to paper. 



