Download A Systematic Vademecum to the Vascular Plants of Puerto Rico by Franklin S. Axelrod PDF

By Franklin S. Axelrod

Have you questioned the place a Puerto Rican plant grows, whilst it flora, the place it comes from? good, this is an annotated list of the vascular vegetation almost immediately discovered transforming into within the wild at the island of Puerto Rico that might be a useful reduction to botanists, ecologists, foresters and anybody else attracted to the flowers of Puerto Rico. the following you will discover the distribution of vascular crops in the island supplied in accordance with a unique scheme that includes either vast physiographic parts and particular geographical websites. those are either defined within the textual content and illustrated by means of 3 maps. additionally, you will locate worthwhile details at the instances of flowering, fruiting, and spore creation for every plant and in addition references for every one to contemporary monographs on Puerto Rican vegetation the place a fuller description of every will be found.

In the earlier few years there were many alterations within the names of person plant taxa (species, subspecies, and kinds) and within the alignment of plant households. those alterations are recorded during this paintings in this kind of approach that older clinical names in addition to Spanish universal names may be tracked to new permitted ones. when you consider that there's a lot overlap of the Puerto Rican flowers with that of different Caribbean islands and components, those nomenclatural alterations can also be of use to researchers operating in these areas.

This list covers 2909 taxa which are integrated in 1053 genera and 210 households. of those taxa 2335 (80.2%) are local and 574 (19.7%) are unique; of the local ones, 243 (10.4%) are endemic.

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A Systematic Vademecum to the Vascular Plants of Puerto Rico

Have you puzzled the place a Puerto Rican plant grows, while it plants, the place it comes from? good, this is an annotated list of the vascular vegetation shortly came across becoming within the wild at the island of Puerto Rico that may be a useful relief to botanists, ecologists, foresters and anyone else attracted to the vegetation of Puerto Rico.

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Thus, wheat, a low-temperature crop, escapes infection by Gibberella saubinetii at low temperatures ( 8 ° - 1 6 ° C ) , while corn, a hightemperature crop, escapes disease at 1 6 ° - 2 8 ° C (Dickson, 1923). Simi­ larly, peach roots, which grow best at 1 0 ° - 1 7 ° C , escape infection b y ArmiUaria at the lower range, but are severely attacked at 1 5 ° - 2 5 ° C ; while citrus roots, which grow best at 1 7 ° - 3 1 ° C , escape infection at that range but are severely infected at 1 0 ° - 1 8 ° C .

The influence of seedling exudates on the resistance of peas to Fusarium and Pythium root rot. Phytopathology 64, 190-193. Langford, Ì . H. ( 1 9 4 5 ) . South American leaf blight of Hevea rubber trees. , Dep. Agric, Tech. Bull. 882. Marx, D. H. ( 1 9 7 2 ) . Ectomycorrhizae as biological deterrents to pathogenic root infections. Annu. Rev. Phytopathol. 10, 429-454. Matthee, F. , and Daines, R. H. ( 1 9 6 8 ) . Effects of soil types and substrate aeration on stomatal activity, water diffusion pressure deficit, water congestion, and bacterial infection of peach and pepper foliage.

The same products are likely to escape disease if they are not kept in storage for too long, and if, when purchased by the final consumer, they are used quickly following refrigeration. V. E F F E C T O F S P A C E D I F F E R E N T I A L S O N ESCAPE Frequently, plants escape disease because of their spatial position in relation to other plants within the same population and in relation to plants in other populations. A. Number and Position of Plants in a F i e l d When the propagules of a pathogen come into a large field from out­ side, the plants farthest away from the edge of the field have a better chance of escaping disease than those closest to it.

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