Thomas A. Zanoni

Volatile Leaf Oils of Caribbean Myrtaceae. I. Three Varieties of Pimenta racemosa (Miller) J. Moore of the Dominican Republic and the Commercial Bay Oil

ABSTRACT The foliar essential oils of Pimenta racemosa (Miller) J. Moore var. grisea (Kiaerskov) Fosb. are dominated by geraniol (0–85.52%), methyl eugenol (0.30–92.60%), and/or trans-methyl isoeugenol (0–86.32%). The foliar essential oils of Pimenta racemosa var. hispaniolensis (Urban) Landrum are dominated by 1,8-cineole (0.05–37.96%), methyl chavicol (0–22.61%), methyl eugenol (0–63.88%), γ-terpinene (0–16.67%), terpinen-4-ol (0.08–28.98%), and/or thymol (0–44.02%). The foliar essential oils of Pimenta racemosa var. ozua (Urban & E. Ekman) Landrum are dominated by 1,8-cineole (47.24–55.93%), limonene (3.62–30.07%), and/or α-terpineol (6.68–15.12%). The commercial bay oil (P. racemosa var. racemosa) is dominated by chavicol (<0.01–15.51%), eugenol (44.41–68.93%), methyl eugenol (0–11.88%), and/or myrcene (0.10–16.17%).

The genus Juniperus in Mexico and Guatemala: Numerical and chemosystematic analysis

Abstract The variation leaf constituents (mostly terpenoids) was analyzed from each of the taxa of Juniperus in Mexico and Guatemala by numerical taxonomic methods. These results were compared with those of a previous study utilizing morphological characters. In general, the two agree on the major groups. Differences between more closely related species were more apparent with the chemical data, whereas more distantly related taxa sometimes appeared to be more closely related chemically due to the presence of a single component such as α-pinene in high concentration in each of the oils. Four large groups are apparent; the deppeanan; flaccidan; monticolan; and the oneseeded (pinchotii) complex. Some taxa ( J. durangensis, J. standleyi, J.jaliscana ) are still of uncertain affinities. This study confirms the morphological data indicating that J. patoniana Martinez should be reduced to a variety of J. deppeana (J. deppeana var. patoniana (Martinez) Zanoni, comb. et stat. nov) . No samplestypical of J. monosperma were found in Mexico and J. monosperma var. gracilis ( sensu Martinez) was found to not be closely allied with J. monosperma from the USA but has some uncertain affinities with species of the one-seeded complex. These relationships need to be examined in more detail. J. blancoi appears to be closely related to J. scopulorum . This information on the junipers of Mexico and Guatemala should prove invaluable to future studies on the evolution of the Juniperus in North America.

Volatile Leaf Oils of Caribbean Myrtaceae. III. Pimenta haitiensis (Urban) Landrum of the Dominican Republic

ABSTRACT The foliar oils of Pimenta haitiensis (Urban) Landrum of the Dominican Republic, which were analyzed by GC/MS, were found to contain 1, 8-cineole (11.35–33.14%), methyl chavicol (11.65–41.10%), linalool (15.97–17.81%), and/or methyl eugenol (0–24.39%) as major constituents.

Alkaloids of argemone subintegrifolia and A. munita

Abstract Argemone subintegrifolia G. B. Ownb. (Papaveraceae) was found to contain 0.14% total alkaloids consisting of 70 % allocryptopine, 20 % protopine,

Analyses of the volatile leaf oils of Juniperus deppeana and its infraspecific taxa: Chemosystematic implications

Abstract Eight OTUs of Juniperus deppeana were collected and their volatile leaf oils analysed by GC/GCMS. The volatile oils are dominated by oxygenated terpenes such as camphor, linalool, cis -verbenol, 4-terpineol, verbenone, borneol and trans -sabinene hydrate. The major monoterpene found was α-pinene. Sesquiterpenoids were minor components of the volatile leaf oils. The six named taxa were only distinguished by combinations of terpenoid characters. The differentiation of the Arizona J. deppeana (var. pachyphlaea ?) and J.d. forma sperryi from the other taxa in Mexico was the major subdivision found. Juniperus deppeana forma sperryi was clearly distinguished as were J.d. var. robusta and J.d. var. patoniana .

Essential oils of plants from Hispaniola. 3. The leaf oil of Canella winterana (Canellaceae).

ABSTRACT The essential oil from the leaves of Canella winterana (L.) Gaertn from the Dominican Republic was analyzed and found to contain a large amount of myrcene (66.41%), with lesser amounts of caryophyllene (7.12), cis-ocimene (4.92), trans-ocimene (4.11), and 1, 8-cineole (3.76). Yield (fresh wt. basis) was 0.42%. No eugenol was found in the leaf oil in contrast to its occurrence in the trunk bark.

The herbarium and botanical art of Hendrik Elingsz van Rijgersma

A herbarium collected by H. E. van Rijgersma in the Caribbean island St. Martin 1865-1868 and 1875 has been found at the Swedish Museum of Natural History (S), Stockholm. The other known collection of van Rijgersmas plants was housed in Berlin (B), but was destroyed in World War II. Specimens collected by him are also kept in Leiden (L). Many of the Stockholm sheets have original illustrations by van Rijgersma in either black and white or in full watercolour, or both. A checklist of specimens and illustrations is presented at http://www.nrm.se/fbo/hist/rijgersma/rijgersma.html.en.