3 6 Early Botanic al Explorers on the Pacific Coast _ 
the Mast, states that he was a passenger on the Pilgrim on its re¬ 
turn voyage, and that he had formerly occupied the chair of Bot¬ 
any and Ornithology in Harvard University. It is said that, in 
order to avoid interruptions, he worked in a garret which he en¬ 
tered by a ladder through a trap-door, and after he was securely 
in, the ladder was pulled up. He made large collections in Cali¬ 
fornia, but the chief trees are Platanus racemosa (Sycamore), at 
Santa Barbara j Aesculus calif ornica (Buckeye), and Alnusrhom- 
hifolia (Alder) at Monterey. D In Oregon, he was the first to 
collect the Oregon Ash {Fraxinus oregona ), also the Blue Elder¬ 
berry (Sambucus glauca ), both common in California. Nuttall 
gave his herbarium to the British Museum, though some of the 
specimens are in the herbarium of the Philadelphia Academy of 
Sciences. Many specimens in the British Museum have manu¬ 
script names which were never published. 
Acer macrophyllum was collected in 1805 in Oregon, on the 
Great Rapids of the Columbia, by Meriwether Lewis of the 
Lewis and Clark expedition. 
Theodor Hartweg was a German gardener, following the pro¬ 
fession of his ancestors. At one time he was employed at the Jar- 
din des Plantes, in Paris, and later he went to England. He was 
then twenty-four years of age. The London Horticultural Soci¬ 
ety sent him on a collecting expedition to Mexico, on which he 
spent seven years and sent back valuable collections of seeds and 
botanical specimens. In 1845, he was sent to California and spent 
some time in the region around Monterey. The Monterey Cy¬ 
press was named Cupressus macro carp a by him. He also discov¬ 
ered Cupressus Goveniana at Monterey. Seeds and specimens of 
