1876.] 



AND HORTICULTURIST. 



151 



Mimusops Sieberi ( ■ 



). A large tree. We 



found the trunk invariably hollow. 



Bumelia parvifolia { ). A shrub or small 



tree. 



Jaquinia armiUaris. A rather small tree with 

 most curiously grained wood. 



Myrsine Floridana. Mostly a shrub, rarely a 

 small tree. 



Ardma Pickeringii. Mostly a shrub, but on 

 the Keys a small tree. 



Oitharexylon villosum (Fiddle-wood). Rarely a 

 small tree. 



Amcennia oblongifoHa (Black Mangrove). Only 

 a tree among the Thousand Islands. 



Aincennia tomentosa (Black Mangrove). At 

 Cedar Keys only. 



Pisonia obtusata ( ). With male flowers. 



Coccoloba Floridana. 20 to 30 feet high. In 

 fruit. 



Coccoloba uvifera (Sea-side Grape). In fruit. 



Persea Catesbiei ( ). No flowers or fruit. 



Drypetes crocea ( ). A small tree. 



Ficus aurea (Wild Fig). A large tree, full of 

 milky juice. It is also called Gum Tree, and the 

 juice forms a kind of India Rubber. 



Ficus . Perhaps the same as the pre- 

 ceding. 



. . . . (Silver Palmetto or Silver Cabbage 

 Tree.) The berries are white, but in the absence 

 of flowers the genus is doubtful. It attains a 

 height of 30 to 40 feet. It occurs first at Cape 

 Romano, and is found sparingly on the main- 

 land southward. It is more common on the 

 Keys, but I never heard of it before. 



Yucca aloifoliaf ( ). I found this from 



Manitee southward, 15 to 25 feet high. 



Pinus Clausa, N. sp. At Apalachicola. Dr. 

 Engelmann is doubtful. Perhaps it may be a 

 variety of P. inops. 



EDITORIAL NOTES. 



Twin Mushrooms. — Mr.Worthington Smith fig- 

 ures a twin mushroom in a recent Gardener's 

 Chronicle. One with two stems and a single head 

 was exhibited some years ago at a meeting of 

 the Philadelphia Academy of Natural Sciences. 



A New Agricultural Grass. — In the Isle of 

 Borbon, they have found a grass — Reana luxu- 

 rians — of which wonderful things are told. Our 

 Southern friends who are ju^ now watching for 



some good grasses suited to their soil and cli- 

 mate should look after it. 



OsMUNDiA aNNAMOMEA. — This is the name of 

 the fern sent by R. P., Indianapolis. " Will Mr. 

 Meehan be kind enough to give the name of the 

 enclosed Fern in the next number of Monthly. 

 It grows in this State. Fronds near 2 feet. I send 

 part of barren and fertile fronds. 



Motion of Tendrils. — Ever since Mr. Dar- 

 win's little work, the motion of tendrils has be- 

 come an interesting study. In Scientific Farmer 

 for March, Prof. Penhallow gives some account 

 of observations made on a squash. The tendrils 

 soon after development commence motion — 

 searching for something to cling to. The revo- 

 lutions continue for two or three days, at no reg- 

 ular rate, when, if no support is found the ten- 

 drils die there. Often about the fourth day they 

 will fall to the ground exhausted, and, after a 

 few hours start up again, make a few more revo- 

 lutions and fall back again. It will often do this 

 several times before giving up finally. How 

 much these act like animated things ! 



Ozone. — This element is considered a purifier 

 of the atmosphere. Where there is a deficiency 

 there is disease. A Dr. Mantogazza of Pavia, 

 finds that odoriferous flowers throw off" ozone 

 largely on exposure to the sun, and therefore 

 this is the great mission of odor in leaves and 

 flowers. It is at any rate a new argument for 

 flower culture in cities. 



Growth of Plants as affected by Latitude. 

 — A Prof. Hoffrnan states that from numerous 

 observations in Central Europe, he may con- 

 clude that as an average, one degree of latitude 

 is equal to 3| days in the development of plants, 

 especially in their spring blossoming. That 

 spring advances at the rate of 3| days for every 

 seventy miles may be true, but it is not true as 

 to the direction of the degrees of latitude on the 

 map. 



Cause and Effect. — How difficult it is to trace 

 the relations between cause and effect is fre- 

 quently illustrated by everyday occurences. A 

 chemical factory started in England in the vicin- 

 ity of a market garden where leeks were a staple 

 crop. The same season the leeks failed disas- 

 trously, and of course the factory was associated 

 in everybody's mind with the fact, and a suit 

 against the factory resulted. Fortunately in this 

 case, science saved a rank injustice from being 

 perpetrated. It was shown that the leeks were 



