. The natural history of plants. Botany. UMBELLIFER^. 99 Peueedanum {Dorema) Ammoniacum. 88 '), the umbellules of which, instead of being united in uinbels, are graduated on the axes of a ramified cluster. This gives the inflorescence quite a pecuHar aspect; but the fruit is, in other respects, quite that of a Ferula or a Peucedan, with soh- tary vittse in the furrows, and often of very 'little thickness.^ Bubon Galbanum^ (fig. 89), of the Cape, is also a woody Peucedan, whose vittsB assume a very large development, especially on the ven- tral face of the carpels. They may advance even to the
. The natural history of plants. Botany. UMBELLIFER^. 99 Peueedanum {Dorema) Ammoniacum. 88 '), the umbellules of which, instead of being united in uinbels, are graduated on the axes of a ramified cluster. This gives the inflorescence quite a pecuHar aspect; but the fruit is, in other respects, quite that of a Ferula or a Peucedan, with soh- tary vittse in the furrows, and often of very 'little thickness.^ Bubon Galbanum^ (fig. 89), of the Cape, is also a woody Peucedan, whose vittsB assume a very large development, especially on the ven- tral face of the carpels. They may advance even to the median Une which they occupy only in the herbaceous species constituting the genus Pteroselinum.* In those named Thysse- linum,^ they are situate deep in the pericarp; but it is quite incorrect to call them seminal. The Alvardias ° are Peucedans of tropical Africa, equally woody and shrubby, the fruit of which is more largely winged than that of P. Galbanum. The wings are large and thin also in the section. Fig. 88. Fruit (?). nearer the true Peucedana. Boissiek {I'l. Or. ii. 98a) has descrihed as a Ferula of the section Feucedanoides, Polyeyrtiis Schlchtl {Linncea, XTii. 126), which is Elueoehytris Fenzl {Flora [1843] ; III. 71,). DeCandollehad separated Eriosynaphe (Pradr. iv. 175; M4m. Ombell. 50, t. 1) from Ferula because the com- missure of the mericarps was, he thought, to- mentose. It is not at all so ; hut on this face are three Tertical salient Tittse, two of which are marginal, formed of this whitish tissue, with cellules fuU of gas, so common in the fruit of the Umbelliferte and often called suherose. This character can form only a sectional distinction. Sometimes to Peueedanum, sometimes to Ferula, has heen referred Opoidia Lindl. (Sot. Eeg. [1839] Mise. 66) which, according to Bentham and HooKEK (Oen. 920), is " very Ukely a species of Peueedanum', allied to Polyei/rta" and which Boissiek {Fl. Or. ii. 1089) still leaves among the doutoul gene
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1871
