Further Studies of Yuccas And Their Pollination
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Y. RUPICOLA, Scheele. No observations have been re- corded on the pollination of this Texan species, which Professor Eiley* believes may have a distinct Pronuba. It is not uncommon from Fort Worth southward, on the black soil with intermingled limestone, but I failed to study wild plants. At Dallas, however, through the kindness of Mr. J. Reverchon, I was able to examine specimens culti- vated on his place, which were blooming simultaneously with the wild Y. Glauca, var. Stricta and frequented ...by Pronuba yuccasella like the latter. These plants are abundantly fertile (each crown dying after blooming), and the structure of the flower indicates that the moth works on them as she does on the filamentosa group, though I was unable to observe her actions. Their seedlings are now spontaneous about the place, and so variable that Mr. Reverchon suspects hybridization with the native variety of glauca, as well as cultivated forms of filamentosa. This will prove an interesting subject for future study, since the habits of Pronuba in caring for her young are so highly specialized, and the details are so minutely carried out, that it was hardly to be expected that a given individual would indiscriminately pass from one species of Yucca to another, though on the other hand, it is known that the more eastern species are all pollinated by representatives of the single species of Pronuba.
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To quickly assess the difficulty of the text, read a short excerpt:
Y. RUPICOLA, Scheele. No observations have been re- corded on the pollination of this Texan species, which Professor Eiley* believes may have a distinct Pronuba. It is not uncommon from Fort Worth southward, on the black soil with intermingled limestone, but I failed to study wild plants. At Dallas, however, through the kindness of Mr. J. Reverchon, I was able to examine specimens culti- vated on his place, which were blooming simultaneously with the wild Y. Glauca, var. Stricta and frequented ...by Pronuba yuccasella like the latter. These plants are abundantly fertile (each crown dying after blooming), and the structure of the flower indicates that the moth works on them as she does on the filamentosa group, though I was unable to observe her actions. Their seedlings are now spontaneous about the place, and so variable that Mr. Reverchon suspects hybridization with the native variety of glauca, as well as cultivated forms of filamentosa. This will prove an interesting subject for future study, since the habits of Pronuba in caring for her young are so highly specialized, and the details are so minutely carried out, that it was hardly to be expected that a given individual would indiscriminately pass from one species of Yucca to another, though on the other hand, it is known that the more eastern species are all pollinated by representatives of the single species of Pronuba.
What to read after Further Studies of Yuccas And Their Pollination?
You can find similar books in the "Read Also" column, or choose other free books by William Trelease to read onlineMoreLess
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