LUNGWORT 



75 



The Lungwort is perennial, increased by division of the root, and is 

 worthy of inclusion in our garden borders. 



The plant is dimorphic. The flowers are rich in honey, which is 

 secreted by the white base of the ovary in the lower part of the corolla- 

 tube, protected by hairs inside the corolla, and much visited by insects. 

 A ring of hairs in the wider part of the tube shelters the honey from 

 rain and flies. The anthers stand at the mouth of the tube (10-12 mm. 

 long) in the short-styled form, and the long stigma stands half-way up 

 the tube, on a style 5-6 mm. long. In the long-styled forms the style 



Photo. Dr. Somerville Hastings 



LUNGWORT (Pulmonaria officinalis, L.) 



is 10 mm. long, and the anther-stalks are very short, 5 mm. from the 

 base of the flower. 



The corolla has an enlarged mouth, so that a proboscis of a bee 

 8 mm. long can reach the honey. The longer elements are touched by 

 insects with the head or the base of the proboscis, and the shorter ones 

 with the maxilla, which forms a sheath to the proboscis, and the plant 

 is legitimately cross-pollinated. The flowers are very conspicuous in 

 spring, and, being well supplied with honey at such a season, are much 

 visited. The oldest and terminal flowers are sterile. The long-styled 

 plant legitimately pollinated produces three times as much seed as 

 those described by Hildebrand. The Lungwort is visited by An- 

 thopkora, Halictus, Bombus, Osmia, Diptera, Andrena, Bombylius, 

 Rhingia, Rhodocera, Coleoptera, Omalium florale. 



Hildebrand pollinated a flower of either form with its pollen or 



