HENDERSON'S HANDBOOK OF PLANTS. 



IMP 



Imperfect. Where certain parts are not 

 developed. As the stamens in some, and 

 the carpels in other flowers. 

 Incised, Incisus. Kegularly divided by 



deep incisions. 



Included. Inclosed in anything; not ex- 

 tending beyond the organs surrounding 

 it. 



Incrusted, Incrustate. Where the outer en- 

 velope is firmly attached to the part it 

 covers, as when a pericarp invests the 

 seed so closely that it seems to form a 

 portion of it. 



Incurved, Incurvus, Incurvate. Bending in- 

 wards; as where the stamens curve to- 

 wards the pistil. 



Indefinite. Many, but uncertain in num- 

 ber, like the stamens of some Cacti. 

 Indigenous. A plant which is the natural 



production of any country; not exotic. 

 Individual. Whatever is capable of sepa- 

 rately existing, and reproducing its 

 kind. 

 Indusium. The membraneous covering of 



the spore-cases of many Ferns. 

 Inferior. When one organ is placed be- 

 low another; thus an inferior calyx 

 grows below the ovary, while an inferior 

 ovary grows, or seems to grow, below a 

 calyx. 



Inflated. Thin, membraneous, slightly 

 transparent, swelling equally, as if inflat- 

 ed with air. 

 Inflorescence. The general arrangement or 



disposition of the flowers in a plant. 

 Insects. In the green-house or grapery, or 

 any place where plants are grown under 

 cover, insects, with few exceptions, are 

 under control ; but when in the open 

 field or garden, we are often powerless 

 against their ravages, particularly when 

 they attack the roots of plants. We can 

 manage many of them, even outside, 



INS 



when they attack branches or leaves; but 

 with others we are as powerless as with 

 those attacking the roots. There is no 

 doubt that the encouragement of birds 

 on farms and in gardens, by feeding and 

 sheltering them, well repays, in the re- 

 turn for the insects they destroy. In 

 nearly all the large cities in this country, 

 since the introduction of the European 

 Sparrow, though in part a seed-eater, 

 there has been a marked absence of .the 

 "Measuring Worm," "Rose Slug," and 

 other caterpillar-like insects. The Rose 

 Slug (Selandria rosea) is a light green in- 

 sect; when fully developed it is about an 

 inch in length. There are apparently 

 two kinds, one of which eats only the 

 outer skin of the leaf on the under side, 

 the other eats it entire. The first is by 

 far the most destructive. In a few days 

 after the plants are attacked, they ap- 

 pear as if they had been burned. An 

 excellent application for the prevention of 

 the Rose Slug is whale oil soap dissolved 

 in the proportion of one pound to eight 

 gallons of water; this, if steadily applied 

 daily for a week with a syringe on Rose 

 plants, in early spring, before the buds 

 begin to develop, will never fail to pre- 

 vent the attacks of this insect If this 

 precaution has been omitted, and the 

 insects are seen on the leaves, white 

 Hellebore powder dusted on the plants 

 will quickly destroy them without in- 

 jury to the plants. The Rose Beetle, 

 (Aramigus Fulleri,) or Bug, as it is com- 

 monly called, however, is a much more 

 difficult insect to deal with. For infor- 

 mation regarding it see page 196. The 

 Rose or Grape Vine Beetle (Melolontha 

 subspinosa) is another pest, usually de- 

 stroying the flowers on the Rose, and 

 both flowers and young fruit on the vine. 



