CONTRIBUTIONS TO WESTERN BOTANY NO. 16 



Arizona. October 1, 1929. Also No. 24683. Baboquivori mountains, 

 Arizona. September 19, 1929. In open places, Tropical, growing in 

 large areas and spreading from underground rootstocks. 

 Pellaea marginata. No. 24684. Ramsey Canon, Huachuca mountains, 

 Arizona. September 30, 1929. Growing along with Cheilanthes 

 myriophylla and Alabamensis on slopes among loose rocks in open 

 places. Tropical. This is the most interesting of all the Arizona 

 ferns because of its rarity and uniqueness. It reminds one at once of 

 Cheilanthes Californica, and has much the same habit. One does not 

 wonder that it was placed in Cheilanthes. It has no place in Pel- 

 laea. It also reminds one of Cryptogramma acrostichoides and 

 Stelleri. 

 Cheilanthes myriophylla. No. 24685. Miller Canon, Huachuca mountains, 

 Arizona. This is the most common of all the ferns, growing among 

 loose rocks and in crevices along with Fendleri, and is conspicuous 

 among the species of Cheilanthes through its rusty-colored scales and 

 tomentum. Tropical. It is very variable and probably includes 

 Lmdheimeri. i 



Cheilanthes Lindheimeri. No. 24686. Baboquivori mountains Arizona. 

 September 19, 1929. In open places amon» rocks and in crevices. 

 Very common. Tropical. 

 Cheilanthes tomentosa. No. 24687. Ramsey Canon. Huachuca moun- 

 tains, Arizona. September 29, 1929. On slopes among looje rocks 

 and in crevices. Tropical. F b 



Chedanthes Fendleri. No. 24688. Ramsev Canon, Huachuca mountains, 

 Ar,zo na . Seeptember 29, 1929. In crevices of rocks. Tropical. 



No. 24689. Baboquivori mountains Arizona 

 Seeptember 20, 1929. This seems quite common in crevices 'of granite 

 rocks. Tropical. It has the ha! . d ) 



loniataphytun, : , us m £ ^ qJ^^ tomentosa , 



but with tne habit of C. Fendleri. Fronds smooth above and green, 

 blTcZl^ v C Stal \ bein S half the whole, the whole frond below 

 S 7th l ^^ y StTaight chestnut-colored tapering hairs, 



are Lt h t 71 '^ ° f Stalk turn int0 narr0w scales, the pinnules 

 Frond" 8 WnW ^ T- SCaleS ***** alon S the midrib are hairs. 

 trinnTnal wtl ^l™' ^^ sli S htl ' V below and ™ch above, 



he P fin a f' " P ^ inna K e ^ W pairS " the P innules abo ^ » P air3 and 

 otov^Sfl/^ 4 PaIrS in the middle of the P^' and 

 mostlv stalked In, 6 T ^ ™ long and often Pandurifori and 



Sffn^ fann,ng a com P lete p° cket - °p en onJ y beIow - 



arises rorn^f /° m ^ ?* Tgin ° f ** frond b y h ^ *S width and 

 Final segments coarselv cWte^Nn ££?n Se P tember 28 > 1029 " 



