1 7 8 ihe Irish Na tu ra list. 



Among the above plants there are a few whose occurrence on 

 Howth possesses more than a local interest. Crambe is now 

 one of the rarest plants in the district, and possibly the 

 station mentioned is its last appearance prior to extinction. 

 A^'ditim nemorosum appears to be very rare in Co. Dublin. 

 Orobanche minor has onl}^ recentl}^ been observed in the 

 County (Colgan, I.N., 1893, p. 285). Mentha P^ilegiiwi is 

 a good addition to the flora of Co. Dublin, and to District 5. 

 For Chc7iopodiuvi viurale Mr. Colgan has only one recent 

 station in County Dublin, so the addition of two others is 

 welcome, and I may here add a third — Rathfarnham — where 

 I gathered it in a gravel pit with Matricaria Chavioinilla last 

 December. 



To the above notes I ma}- add the following : — 



ADDITIONAIv STATIONS FOR RARER HOWTH PLANTS. 



Sisymbrium Irlo, L. — Roadside east of Sutton railway station. 



S. thalianum, (raud.— Steep banks above the sea at the north side 

 of the Bailey— D. M'Ardle. 



Sinapis nigra, L. — Rough ground above Carrickbrack House. 

 Viola hirta, Iv.— Dry field east of Glenaveena. 



Trifolium striatum, L.— Plentifully above the Martello tower at 

 Sutton. — ]Miss R. Mahaffy. Mr. Hart records it from Ireland's Eye alone, 

 disallowing Dr. oMoore's " Howth " record in Cyhele Hibernica. 



Rosa tomcntosa, Sm.— Near Waldron's tavern, and below 

 Glenaveena. — Miss R. Mahaffy, 



Pyrus Aria, Sm. — Sparingly on a rock near the summit of Ireland's 

 Eye. I failed in spite of careful search to find it in its only recent 

 recorded station " rocks high up on Dung Hill, looking north " {Flora 

 of Howth). 



Valerlanella Auricula, DC— Roadside near Sutton station. 



Helminthia echioidcs, Gaert, — Steep banks at the Needles, 



Centiana Amarella, L.— On Shelmartin, Miss R, Mahaffy. Mr. 

 M'Ardle writes that he formerly found it plentifully in a stony pasture 

 field at Sutton, but he thinks the place is built over now. 



C. campestris, L.— On Ireland's Eye, near the Martello tower. 



Hyoscyamus nigcr, L.— Abundant on the southern slope close to 

 the Bailey lighthouse, R. LI. Praeger, I.N., 1S94, p. 156. On Shelmartin, 

 and at Corr Castle— Miss R. Mahaff"y. Miss Mahaffy tells me that the 

 seeds are smoked by certain persons, which may account for the spread 

 of this plant. 



Stachys arvensis, L. — Needles field, Miss R. Mahaffy. 



Carcx cxtcnsa, Good. — Rocks on the shore near the Bailey. 



Phragmitcs communis, Trin.— By the sea below EarLscliff. 



