78 



Panicum Crus-galli L., a form. Found only a few plants by a ditch of water in a, 



garden. No. I'.SO. 

 Setaria caudata Beanv. Cane-like grass, 4 to 5 feet liigh. Found in low places 



near dry creeks. No. 125. 

 Cenchrus Palmeri Vasey. Proc. Cal. Acad., 2nd series, II. 211. Common on low, 



saudy bottoms. No. 132. 

 Aristida Californica Thurb. Found among bushes on mesas. No. 128. 

 Aristida dispersa Triu. Habitat as 127. No. 127a. 

 Aristida dispersa, var.? Fonurt upon rocky hillsides. No. 128. 

 Muhlenbergia debilis Trin. Grew in the shade of bushes and rocks. No. 129. 

 Chloris elegans H. K. K. Found in a garden by a water ditch. No. 133. 

 Bouteloua polystachya Torr. Found among bushes on mesas. No. 226. 

 Mouanthochloe littoralis Engelni, Very common in salt marshes. No. 123. 

 Diplachne imbricata Thurb. Grew by a water ditch in a garden. No. 134. 

 Eragrostis Purshii Schrad., var. Habitat as I'M. No. 135. 

 Rbachidospermum Mexicanum Vasey. Hot. Gaz. XV. lOfi, PI. XII. Found on 



sandy bottoms at a short distance from the ocean, growing sparsely in small 



bunches. A few plants only had seed. No. 124. 



LICHENS. 



The following lichens were determiued by Mr. Walter Evans: 



Ramalina complanata Ach. No. 85a. 



Physcia tribacia Tuckerman. Found near the ocean. No. 85b. 



SAN PEDRO MARTIN ISLAND PLANTS. 



Dr. Palmer visited this island' two years ago, making a collection of 

 nineteen species, twelve of which were considered peculiar to tlie i.sland. 

 On February 13 of the present year he spent one day on this island 

 and obtained but three plants, all CompositiB. One is the new genus 

 Peluchu of Mr. Watson, now collected in splendid condition and in 

 abundance. Another proves to be a new species of Hofmehteria, nnd 

 the third a Perityle^ new to the island. Dr. Palmer makes the follow- 

 ing note with reference to the flora of the island : These ])Iants did not 

 bloom during the rainy season of 1887, as they are winter bloomers. 

 There is no especial flora making its appearance, as has been supposed, 

 during the winter. No rain has fallen since early in Novend)er, an<l all 

 plants except those deeply rooted are dry and dead. The following is 

 a list of the twenty species known to inhabit the island. Those which 

 are peculiar to the island are marked thus.* 



•Sph»ralcea,8p. I Perityle Emoryi Torr 



Abutilon aurantiaciim Wats. Trixis angustifolia DC, var latiuscnla 



Petalonyx linearis Greene. 

 Mentzelia adha^reus Uenth. 

 Ecliinopepon insuiaris Wats. 

 Cereus Pringlei Wats. 

 Opuutia? 



Hofmeisteria laphannoides Rose. 

 Baccharis sarothroides Gray. 

 •Pelucha trifida Wats. 



Gray. 

 Nicotiana trigonophylla Dnnal. 

 Stegiiosperma iialimifolia Uenth. 

 Knphorhia petrina Wats. 

 Fiiiis Palmeri Wats. 

 Cyperns aristatus Rottb. 

 Muhlenbergia tenella Trin. 



> For note concerning this island see Watson. Proc. Amer. Acad. XXIV. ;i7. 



