Plants and their ways in South Africa . Fig. 251.—Disa racemosa, Linn. Those with the glands of the pollinia united are placed inthe genera Monadetiia (odd sepal spurred), Amphigeiia (rostel-lum without appendage), Herschelia (rostellum 3-toothed). Schizodium is similar to Disa, but the sharp angles atthe nodes will tell this genus. Petals narrow, 2 -lobed at thetip, or twisted, and often eared at base. The lip is anotherdistinguishing feature. It is as long as the sepals, narrowedabove the base and often pointed, or the tip may be broad andwaved, marking the lip into three distinct parts—a lo
Plants and their ways in South Africa . Fig. 251.—Disa racemosa, Linn. Those with the glands of the pollinia united are placed inthe genera Monadetiia (odd sepal spurred), Amphigeiia (rostel-lum without appendage), Herschelia (rostellum 3-toothed). Schizodium is similar to Disa, but the sharp angles atthe nodes will tell this genus. Petals narrow, 2 -lobed at thetip, or twisted, and often eared at base. The lip is anotherdistinguishing feature. It is as long as the sepals, narrowedabove the base and often pointed, or the tip may be broad andwaved, marking the lip into three distinct parts—a lower,upper, and middle. Disperis, Pterygodium, and Ceratandra are nearly 28o Plants and their Ways in South Africa allied genera with the differences given in the key. InDisperis and Ceratandra the lip is clawed. Pterygodium has a. Fig. 252.—Disa jnelaleuca, Sw. Orthopoithea bivalvata (Rolfe), sessile lip, and, like that of Disperis^ it is often bent back overthe column into the helmet. Habenaria is a large genus found chiefly in the East. Itmay be recognized by the long spur of the three-parted lip andthe usually 2-parted petals. The lip is sometimes entire. Stem either leafy at the base or the entire length. Flowers in spikesor racemes, large or small, sometimes quite beautiful, though not brightcoloured. Found in February and March. Corycium is nearly like Pterygodium, but the two sepalsjoin in front to form a lower lip. The stigmas are two, separate,or one 2-lobed. Capsule usually much narrowed toward theapex. Stem leafy. Leaves flat or crinkled. The genusmerges into Pterygodium. Classification of Plants 28 Order Amentace^ orders Salicaceae, Myricaceae, Juglandaceae,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1915
