130 



vembcr 1-7, 1800). He vi^nitod uU i>arts of the islniid aiirl brought back 

 a small but iutei-ostiug collection. The, flora is almost identical with 

 that of the peninsula. Of this collection 49 species are known to be 

 common to the peninsula and island; others will doubtless be found; 21) 

 species are also common to Mexi<;o, and 25 to the TTnited States; of the 

 latter, 9 are grasses; 10 of the s])ecies were collected by Dr. Palmer at 

 La Paz in ISOO; 7 s])ecies are, so far as known, local, 5 of whi(;h are 

 here for the first time (h'scribed. The island was so thoroughly exi)lored 

 that probably veiy few sjtecies will be added to the list, and a i'e^\' details 

 will not be out of place. The number of genera represented on the 

 ishmil is (ib, and of species, <J8. Of the species 21 are Polypetahe, 24 

 Gamopetahe, 10 Apetahe, and 13 Monocotyledons. Of these, more 

 than one-lialf (37) belong to 4 families, viz: Leguminosai 7; Com- 

 posita' 12; Eupliorbiacea^ 6; and (Jramin* 12; one family belongs to 

 each of the four groujis mentioned above; and over one-third (24) be- 

 long to two families, viz: Composita' and (Jramime. Orchidacea' and 

 Filices, the third and fourth largest fatuilies of Mexico, are not repre- 

 sented on the island. 





































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!Niiiiili('i' (>(' m^iicia 



IUl[i"{'!IOMH .spi'cit'rt - 



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Cm 11 111(111 t(i Mexico.. 





('oiiiiiiiiu lo l,<i\V('r Ciilif'oi iihi . 1 



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49 



C'oiiiitioii to I'liiff^d Sluti'.i 1 





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25 

 19 



CoUixtud Uv I'nliiioi- at Jja 1'hi! 





i 

























Drymaria diffusa "R<isf, n. sp. Stems .sleiido', nmcli briuicliod from a penMinial base, 

 soiiu^wluit 8laii<liilar-i)nb('sct>nttlir()u<;lioiit: leuveH tliin, broadly ovate to deltoid, 

 2 to 4 iuchea lonjj (on ])cti(dos somcwliat lonfi;er), trmicati^ at base, acute or 

 slii^htly aciimiiiato at apox: inlidrcsccnce few-flowered cvuk's: pedicels liliform, 

 5 to 8 lines lonij: sepals equal, 1 to II lines lono>. tliin, obloni;, aciitish, delicately 

 1-norved, scarioiis margin : ]iotii]s twice as bmo- as tlie sejials, 2-parted to tlio 

 middle into oblong or spatnlate segments: stamen s Ti, iiner|nal, shorter than the 

 petals : capsnle globose, U lines long, short stipitate, about n)-ovnled, 3-8eeded.— 

 C;rowH on the shady side of a canon in roundish bunches. No, 819. 



This is I), filandnlosa Watson, Proe. Amor. Aca<l. xvii. 328, in part. Our plant 

 differs from this species in its leaves not being so broad, and in lia ving long petals : 

 lower stipules wanting or deciduous, not lacerate: sepals smaUer and not so 

 strongly nei'\'od. 



Collected by Palmer in 1870 (No, 4) and di8tribut(^d as 1). ramossuima. 

 Exi>i,ANATiox OK I'LATE XIT.— TIio pliiiit is slioTvu iiiitiiral n'v/.v. a, ciipsiilo Kliowini; seeds and 

 style; li, aiietal; c. astami'ii: rf, ast'pal; all aoiiu'What eiihiigiiil. 



Abutilon Dugesi Watson. Only a few plants seen in a canon, and in poor condition. 

 No. 810. Nearest the .above siteeies, but not very satisfactorily iilact'd there. 



Hibiscus denudatus IScntli. ,V very poor sjiecimen olitaiiu'd, badly infested by an 

 insect (Kriscocensn. sp.). Also ()btained in 1870 (No. 15). No. 826. 



