Question: what are the club shaped structure in lycopodium called
[{'answer': 'fertile stems', 'provenance': [{'wikipedia_id': '1037904', 'title': 'Lycopodium', 'start_paragraph_id': 1, 'start_character': 832, 'end_paragraph_id': 1, 'end_character': 845, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'spore - cases ( sporangia )'}, {'provenance': [{'wikipedia_id': '1037904', 'title': 'Lycopodium', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 884, 'bleu_score': 0.9854535765681661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17441523514757631948}, 'section': 'Section::::Abstract.'}]}]