Historic fossil cycads ; Accelerated cone growth in Pinus / by G.R. Wieland.
- George Reber Wieland
- Date:
- 1908
Licence: In copyright
Credit: Historic fossil cycads ; Accelerated cone growth in Pinus / by G.R. Wieland. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
11/15 page 102
![Art. X.—Accelerated Cone Growth in Pinus; by G. R. WIEL AND. The rare but suggestive instance of multiseriate production of ovulate cones in Pinus rigicla, illustrated in the accom- panying figure, has been recently brought to my notice by one of my colleagues. This conspicuous group of cones appears to have been derived from some New England source many years ago, having been found with a series of geological speci- mens collected or left in the Peabody Museum by Professor Benjamin SiUiman and probably not examined since his day. As appears in the fig- ure, the individual cones, of which there are fifty- three in all, are nearly all of normal or approxi- mately normal develop- ment and so regularly crowded together on their common axis as to simulate, taken en masse, some such single huge cone as that of Pinus Coulteri. It is clear enough, however, that the entire growth of cones is not in any com- plete sense an abnormal- ity ; for each cone must appear normally in the axil of a bract, just as do the several up to half a dozen cones in the usual ovulate clusters [or whorls], and exactly as in the case of the far more numerous cones of the corresponding stami- nate groups. * At the time this note was first written it seemed to me that its interest was somewhat lessened by the fact that after diligent search and inquiry I failed to leam of additional examples of clustered Pinus cones. Since then, however, I have seen three large and even finer clusters in the collections of the Jardin des Plantes, Paris. No label accompanied these specimens, which represent at least two more species of Pinus exhibiting accelerated cone growth.](https://iiif.wellcomecollection.org/image/b2241017x_0014.jp2/full/800%2C/0/default.jpg)
