OF MARINE COASTS. 121 



POLYGOXACEAE. 

 Chorizanthe pungens Benth. 

 Annual, witli prostrate branches, 5 — 30 cm. long; leaves spatulate, 

 1 — 3 cm. long, opposite, petioles of cauline leaves 10 mm. long, those 

 of the radical 25 mm. 



Sand hills on C'alifornian coast, from San Francisco to Monterey Bay. 



Eriogonum latifoUnm Smith. 



Perennial herb, stout, tomentose, the indurated caudex with short 

 leafy branches ; leaves 2 — 5 cm. long, oblong to ovate, obtuse or acute 

 at apex, rounded or cordate at base, margin often undulate, upper 

 surface glabrate, densely woolly beneath: petioles often margined. 



Sand formations along California coast, occasionally together with 

 other species of the genus. 



Muehlenbeckia adpressa Meissn. 



Stem woody at base, prostrate or climbing; leaves petiolate, lance- 

 olate or hastate, obtuse, 2 — 7 cm. long, margins crisped, glabrous; 

 flowers small, green. 



On the sea coast of Tasmania, Victoria, South Australia, and West 

 Australia (Fremantle). 



-1/. complexa Meissn. is a species occasionally occurring on sea beach- 

 es of Xorth Cape, Xew Zealand. 



Polygonum aviculare L. 



Annual herb, prostrate, with branches le&fy to the end, glabrous 

 and green, stems wiry, minutely striate, sometimes meterlong; leaves 

 oblong, acute, 1 — 2 cm. long, shortly petiolate. 



Almost everywhere on the globe, especially in temperate climates. 



Very variable, especially on sea shores, where a number of forms 

 occur, as yet insufEicienth- known. 



P. maritimum L. 

 Perennial, somewhat woody; branches short, thick: leaves glaucous, 

 thick, larger than in P. aviculare, which it resembles, especially when 

 young. 



P. Raiji Bab. 

 is a nearly related form, differing only in the fruits. 



The distribution of these forms is not well known, but they are 

 found in a number of widely separated localities. 



Library Publications. 8 



