Jan., 1913. Annual Report of the Director. 215 



size "berry" in section and a fruit enlarged to reveal its various parts; 

 the Sapodilla family has received the addition of a natural size branch 

 of the Sapodilla tree in full leaf and fruit, an enlarged flower cluster, 

 and a fruit of the Star-apple with leaves ; the Milkweed family has been 

 augmented with an enlarged flower of the rosy Milkweed (Asclepias 

 incarnata) showing also the method of its cross fertilization (three 

 models) ; in the Arrowroot family three enlarged flowers have been 

 modeled and installed illustrating the natural preventive measures 

 evolved to prevent self-pollination. A branch has been added to the 

 Pine-apple family representing the more usual mode of growth of plants 

 of this family as aerophytes resting upon other plants, i. e. Tillandsia 

 recurvata growing upon a leafy branch of the Calabash tree. The 

 Snakeroots have received the addition of a full size reproduction of the 

 Swan-flower vine comprising a portion of the whole plant with several 

 leafy vine sections bearing an unexpanded flower and one, fully opened, 

 from eight to ten inches in diameter; also a flower in section showing 

 the peculiar provision for fertilization by insects, together with an 

 enlarged section of the ovary and the column of essential organs. To 

 the Rose family there has been incidentally added a reproduction of a 

 pair of interesting hybrid apples each showing a clearly demarked half 

 of two varieties. To the Clove family a natural size reproduction of 

 a full flowering, leafing and fruiting branch of the Guava tree has been 

 added, to the Arums the full fruiting head of the Indian Turnip and to 

 the Lily family a complete flower of the wild Lily showing its char- 

 acteristic organs. Attention to the representation of the multitudinous 

 cohorts of lower plant life, the non-flowering plants, most of which 

 require modeling through the use of the compound microscope, is now 

 begun and the following results placed on exhibition: A natural size 

 reproduction of a Giant Puff ball, 14 inches in diameter, and a section 

 of the same; a colony of Inky Mushrooms, in situ, comprising a "but- 

 ton," a full freshly expanded plant and one in the deliquescing stage 

 dropping its spore-charged inky liquid. The Liverworts are represented 

 through the following models : A natural size reproduction of a mass of 

 plants of Marchantia in situ; an enlarged transverse section of a thallus 

 with male branches, rhizoids, gemma buds and open cups; a longitudinal 

 section of a thallus with female branches; a life-history group showing 

 a female branch, in section, disclosing the archegonia, an archegonium 

 in section showing the egg-cell, another showing a sperm-cell entering 

 its neck below; a male branch, in section, disclosing the spermaries, 

 and a sperm-cell — all modeled highly magnified ; another life-history 

 group representing a female branch with spore-capsules (Sporogonia) 

 in situ; an embryo formed from the fertilized egg-cell, another with 



