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By Alice Lounsberry

Frederick A. Stokes Co., 1899. eco-friendly forums are good - exhibit substantial shelfwear and soiling. backbone pale. textual content is fresh and unmarked. Pencil notation on entrance pastedown. prior owner's identify in ink on name web page. No DJ.

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3 0 . ) C r e n a t e , or S c o l l o p e d : when the teeth are r o u n d e d . (FIG. ) I n c i s e d : when the teeth are coarse a n d jagged a n d extend deeper into the leaf. ( F I G . 3 4 . ) FIG. 44. FIG. 45. FIG. 46. L o b e d : when the incisions e x t e n d about half way to the m i d r i b ; and i n w h i c h case the leaf is spoken of as three l o b e d , five lobed, or a c c o r d i n g to the n u m b e r of lobes f o r m e d . ( F I G . 4*0 Cleft : when the incisions reach more than half way to the midrib.

COLOUR Blue. ODOUR Scentless. RANGE Mostly north and west. TIME OF BLOOM April-September. Flowers: growing loosely in axillary, slender racemes. Corolla : w h e e l s h a p e d , of f o u r l o b e s . Calyx: f o u r - p a r t e d . Stamens: t w o . Pistil: one. Leaves : o n p e t i o l e s ; o p p o s i t e ; o b l o n g o r l a n c e o l a t e ; s e r r a t e d . Stem : s m o o t h ; slightly curving and branched. I t is m o s t l y i n b r o o k s and watery ditches that we find this dear l i t t l e plant.

I n 1 8 9 6 the W a r D e p a r t m e n t at W a s h i n g t o n was asked to exert its influence w i t h this u n r u l y plant, w h i c h was b e c o m i n g a serious menace to navigation. I t has also destroyed bridges, interfered w i t h the t i m b e r i n d u s t r y , a n d affected the health of the region by u p h o l d i n g objectionable o r g a n i c matter. Great floating masses of the w a t e r - h y a c i n t h are m o o r e d to the shore by those that have rooted i n the shallow water.

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