. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. parts of thecountry. It is an herb, growing two or three feet high in drysoil. If this plant cannot be had, the pupil may find other spurges,for they are common; or he may ask a gardener for a plant ofpoinsettia or for one of the thorny euphorbias of greenhouses; orhe may easily grow the variegated spurge, seeds of which are soldunder the name of snow-on the-mountain. All the spurges have milky juice. The pupil shouldmake an earnest effort to ob-tain some euphorbiaeeons flowerfor dissection.
. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. parts of thecountry. It is an herb, growing two or three feet high in drysoil. If this plant cannot be had, the pupil may find other spurges,for they are common; or he may ask a gardener for a plant ofpoinsettia or for one of the thorny euphorbias of greenhouses; orhe may easily grow the variegated spurge, seeds of which are soldunder the name of snow-on the-mountain. All the spurges have milky juice. The pupil shouldmake an earnest effort to ob-tain some euphorbiaeeons flowerfor dissection. The flowers ofthe castor bean, although not ininvolucrate heads, will be use-ful in this cionneetion, for thisplant is one of the Euphorbia-oesB. 2516. The pupil may be askedto explain the flowers of thered or swamp maple in Fig. picture may suggest aneuphorbiaceous type of flower,but the pupil must not be misledby appearances. These red flow-ers of the maple are among thevery earliest flowers of spring,Fio. 211. appearing while the branches are Flowers of red maple. still bare of 252. One of the most reduced of flowers, inpoint of size, is that of the duckmeats, or are minute plants (Fig. 212), ^comprising 220 LiJSSON^S WITH PLANTS only a floating leaf (or frond) and one or morehanging roots. They are -common upon stagnantpools, often covering the water witha blanket of green. Three plantsof one of the common kinds areshown, about six timesenlarged, in the flowers (shown atthe right) spring from themargin of the frond, andconsist of two flowers ofa single stamen each anda single pistillate flower,the three borne in a co-rolla-like spathe (determined to be aspathe by the manner in which itarises from the frond and by homol-ogy with related plants). The twolocules of the anthers are more orless separated, as if the anther were4-loculed. The presence of the spatheat once removes this plant from thosegroups which we have chiefly studied,an
Size: 1522px × 1642px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbai, bookcentury1900, bookdecade1900, booksubjectbotany
