"1899] Collins, — Rhode Island plant-notes 47 
and spreading. The last two are also found in Pawtucket (Miss 
McCudden). 
Lactuca Scariola L. was first discovered in the Elmwood district 
in 1894. Since then it has spread so rapidly that it now occupies 
several waste places near its original station to the exclusion of nearly 
every other plant. It has also extended completely across the city 
and doubtless much farther. It is becoming deplorably abundant. 
Physalis Philadelphica Lam., has persisted at one station for at 
least seven years. 
Salsola Tragus L., (the Russian Thistle). About twenty plants 
were discovered in October, 1898. A detailed account of this plant 
and its discovery in Providence, may be found in the Providence: Jour- 
nal, of November 13 and December 31, 1898. 
For the sake of brevity, the following plants are grouped under 
appropriate headings. 
1. Plants found on many wastes or roadsides, though not neces- 
sarily abundant at each station. 
Amarantus retroflexus L., Brassica juncea Cosson, Carum Carui 
L., Zropeolum majus L. 
2. Plants frequently found at different stations. 
*Amarantus blitoides Wats., Chenopodium ambrosioides Ris ud 
Bonus- Henricus L., Commelyna Virginica L., Galinsoga parviflora 
hispida DC., Helianthus annuus L., Ipomea purpurea Lam., Lychnis 
Flos-cuculi L., Mentha arvensis L., Petunia (two garden forms), 
Phaseolus vulgaris L. 
3. Plants occasionally found, but less abundantly than those of the 
preceding group. 
Alyssum incanum L., * Artemisia Ludoviciana Nutt., * Astilbe Japon- 
ica Gray, Brassica campestris L., * Carduus nutans L., Delphinium 
Ajacis L., Galium Mollugo L., * G. tricorne With., Helianthus petiolaris 
Nutt., Papaver dubium L., Saponaria Vaccaria L., Silene Armeria L, 
*Symphorocarpus racemosus Mx., Vicia sativa angustifolia Serringe. 
4. Plants found but a few times (rare). | 
Alyssum calycinum L., Coreopsis cardaminefolia T. & G., Datura 
Metel L., Dipsacus sylvestris Mill., Fentculum officinale All., Funkia 
ovata Spreng., * Gypsophila muralis L. (station now obliterated), Zo- 
mæa coccinea L., Papaver somniferum L., Plantago Media L., Poterium 
Sanguisorba L., Reseda lutea L., Rumex altissimus Wood., * Scandix 
Pecten-veneris L., Sisymbrium Thaliana Gaud., Spinacea oleracea Mill, 
